mingo

iOS开发 之 UIView详解

//
//  UIView.h
//  ZMHeaderFile
//
//  Created by ZengZhiming on 2017/5/22.
//  Copyright © 2017年 菜鸟基地. All rights reserved.
//
//  详解 UIResponder.h
//  Version iOS 10.3
//
 
#import <Foundation/Foundation.h>
#import <QuartzCore/QuartzCore.h>
#import <UIKit/UIResponder.h>
#import <UIKit/UIInterface.h>
#import <UIKit/UIKitDefines.h>
#import <UIKit/UIAppearance.h>
#import <UIKit/UIDynamicBehavior.h>
#import <UIKit/NSLayoutConstraint.h>
#import <UIKit/UITraitCollection.h>
#import <UIKit/UIFocus.h>
 
NS_ASSUME_NONNULL_BEGIN
 
/** 动画的曲线枚举 */
typedef NS_ENUM(NSInteger, UIViewAnimationCurve) {
    UIViewAnimationCurveEaseInOut,  //!< 慢进慢出（默认值）.
    UIViewAnimationCurveEaseIn,     //!< 慢进.
    UIViewAnimationCurveEaseOut,    //!< 慢出.
    UIViewAnimationCurveLinear,     //!< 匀速.
};
 
//!< UIView内容填充模式.
typedef NS_ENUM(NSInteger, UIViewContentMode) {
    UIViewContentModeScaleToFill,       //!< 缩放内容到合适比例大小.
    UIViewContentModeScaleAspectFit,    //!< 缩放内容到合适的大小，边界多余部分透明.
    UIViewContentModeScaleAspectFill,   //!< 缩放内容填充到指定大小，边界多余的部分省略.
    UIViewContentModeRedraw,            //!< 重绘视图边界 (需调用 -setNeedsDisplay).
    UIViewContentModeCenter,            //!< 视图保持等比缩放.
    UIViewContentModeTop,               //!< 视图顶部对齐.
    UIViewContentModeBottom,            //!< 视图底部对齐.
    UIViewContentModeLeft,              //!< 视图左侧对齐.
    UIViewContentModeRight,             //!< 视图右侧对齐.
    UIViewContentModeTopLeft,           //!< 视图左上角对齐.
    UIViewContentModeTopRight,          //!< 视图右上角对齐.
    UIViewContentModeBottomLeft,        //!< 视图左下角对齐.
    UIViewContentModeBottomRight,       //!< 视图右下角对齐.
};
 
/** UIView动画过渡效果 */
typedef NS_ENUM(NSInteger, UIViewAnimationTransition) {
    UIViewAnimationTransitionNone,          //!< 无效果.
    UIViewAnimationTransitionFlipFromLeft,  //!< 沿视图垂直中心轴左到右移动.
    UIViewAnimationTransitionFlipFromRight, //!< 沿视图垂直中心轴右到左移动.
    UIViewAnimationTransitionCurlUp,        //!< 由底部向上卷起.
    UIViewAnimationTransitionCurlDown,      //!< 由顶部向下展开.
};
 
/** 自动调整大小方式 */
typedef NS_OPTIONS(NSUInteger, UIViewAutoresizing) {
    UIViewAutoresizingNone                 = 0,     //!< 不自动调整.
    UIViewAutoresizingFlexibleLeftMargin   = 1 << 0,//!< 自动调整与superView左边的距离，保证与superView右边的距离不变.
    UIViewAutoresizingFlexibleWidth        = 1 << 1,//!< 自动调整自己的宽度，保证与superView左边和右边的距离不变.
    UIViewAutoresizingFlexibleRightMargin  = 1 << 2,//!< 自动调整与superView的右边距离，保证与superView左边的距离不变.
    UIViewAutoresizingFlexibleTopMargin    = 1 << 3,//!< 自动调整与superView顶部的距离，保证与superView底部的距离不变.
    UIViewAutoresizingFlexibleHeight       = 1 << 4,//!< 自动调整自己的高度，保证与superView顶部和底部的距离不变.
    UIViewAutoresizingFlexibleBottomMargin = 1 << 5 //!< 自动调整与superView底部的距离，也就是说，与superView顶部的距离不变.
};
 
/** UIView动画选项 */
typedef NS_OPTIONS(NSUInteger, UIViewAnimationOptions) {
    UIViewAnimationOptionLayoutSubviews            = 1 <<  0, //!< 动画过程中保证子视图跟随运动.
    UIViewAnimationOptionAllowUserInteraction      = 1 <<  1, //!< 动画过程中允许用户交互.
    UIViewAnimationOptionBeginFromCurrentState     = 1 <<  2, //!< 所有视图从当前状态开始运行.
    UIViewAnimationOptionRepeat                    = 1 <<  3, //!< 重复运行动画.
    UIViewAnimationOptionAutoreverse               = 1 <<  4, //!< 动画运行到结束点后仍然以动画方式回到初始点.
    UIViewAnimationOptionOverrideInheritedDuration = 1 <<  5, //!< 忽略嵌套动画时间设置.
    UIViewAnimationOptionOverrideInheritedCurve    = 1 <<  6, //!< 忽略嵌套动画速度设置.
    UIViewAnimationOptionAllowAnimatedContent      = 1 <<  7, //!< 动画过程中重绘视图（注意仅仅适用于转场动画）.
    UIViewAnimationOptionShowHideTransitionViews   = 1 <<  8, //!< 视图切换时直接隐藏旧视图、显示新视图，而不是将旧视图从父视图移除（仅仅适用于转场动画）.
    UIViewAnimationOptionOverrideInheritedOptions  = 1 <<  9, //!< 不继承父动画设置或动画类型.
    
    UIViewAnimationOptionCurveEaseInOut            = 0 << 16, //!< 动画先缓慢，然后逐渐加速.
    UIViewAnimationOptionCurveEaseIn               = 1 << 16, //!< 动画逐渐变慢.
    UIViewAnimationOptionCurveEaseOut              = 2 << 16, //!< 动画逐渐加速.
    UIViewAnimationOptionCurveLinear               = 3 << 16, //!< 动画匀速执行，默认值.
    
    UIViewAnimationOptionTransitionNone            = 0 << 20, //!< 没有转场动画效果.
    UIViewAnimationOptionTransitionFlipFromLeft    = 1 << 20, //!< 从左侧翻转效果.
    UIViewAnimationOptionTransitionFlipFromRight   = 2 << 20, //!< 从右侧翻转效果.
    UIViewAnimationOptionTransitionCurlUp          = 3 << 20, //!< 向后翻页的动画过渡效果.
    UIViewAnimationOptionTransitionCurlDown        = 4 << 20, //!< 向前翻页的动画过渡效果.
    UIViewAnimationOptionTransitionCrossDissolve   = 5 << 20, //!< 旧视图溶解消失显示下一个新视图的效果.
    UIViewAnimationOptionTransitionFlipFromTop     = 6 << 20, //!< 从上方翻转效果.
    UIViewAnimationOptionTransitionFlipFromBottom  = 7 << 20, //!< 从底部翻转效果.
    
    UIViewAnimationOptionPreferredFramesPerSecondDefault     = 0 << 24, //!< 默认的帧每秒.
    UIViewAnimationOptionPreferredFramesPerSecond60          = 3 << 24, //!< 60帧每秒的帧速率.
    UIViewAnimationOptionPreferredFramesPerSecond30          = 7 << 24, //!< 30帧每秒的帧速率.
    
} NS_ENUM_AVAILABLE_IOS(4_0);
 
typedef NS_OPTIONS(NSUInteger, UIViewKeyframeAnimationOptions) {
    UIViewKeyframeAnimationOptionLayoutSubviews            = UIViewAnimationOptionLayoutSubviews, //!< 动画过程中保证子视图跟随运动.
    UIViewKeyframeAnimationOptionAllowUserInteraction      = UIViewAnimationOptionAllowUserInteraction, //!< 动画过程中允许用户交互.
    UIViewKeyframeAnimationOptionBeginFromCurrentState     = UIViewAnimationOptionBeginFromCurrentState, //!< 所有视图从当前状态开始运行.
    UIViewKeyframeAnimationOptionRepeat                    = UIViewAnimationOptionRepeat, //!< 重复运行动画.
    UIViewKeyframeAnimationOptionAutoreverse               = UIViewAnimationOptionAutoreverse, //!< 动画运行到结束点后仍然以动画方式回到初始点.
    UIViewKeyframeAnimationOptionOverrideInheritedDuration = UIViewAnimationOptionOverrideInheritedDuration, //!< 忽略嵌套动画时间设置.
    UIViewKeyframeAnimationOptionOverrideInheritedOptions  = UIViewAnimationOptionOverrideInheritedOptions, //!< 不继承父动画设置或动画类型.
    
    UIViewKeyframeAnimationOptionCalculationModeLinear     = 0 << 10, //!< 连续运算模式, 默认.
    UIViewKeyframeAnimationOptionCalculationModeDiscrete   = 1 << 10, //!< 离散运算模式.
    UIViewKeyframeAnimationOptionCalculationModePaced      = 2 << 10, //!< 均匀执行运算模式.
    UIViewKeyframeAnimationOptionCalculationModeCubic      = 3 << 10, //!< 平滑运算模式.
    UIViewKeyframeAnimationOptionCalculationModeCubicPaced = 4 << 10  //!< 平滑均匀运算模式.
} NS_ENUM_AVAILABLE_IOS(7_0);
 
typedef NS_ENUM(NSUInteger, UISystemAnimation) {
    UISystemAnimationDelete,    //!< 系统删除动画
} NS_ENUM_AVAILABLE_IOS(7_0);
 
typedef NS_ENUM(NSInteger, UIViewTintAdjustmentMode) {
    UIViewTintAdjustmentModeAutomatic,  //!< 自动的，与父视图相同.
    
    UIViewTintAdjustmentModeNormal,     //!< 未经修改的.
    UIViewTintAdjustmentModeDimmed,     //!< 饱和、暗淡的原始色.
} NS_ENUM_AVAILABLE_IOS(7_0);
 
typedef NS_ENUM(NSInteger, UISemanticContentAttribute) {
    UISemanticContentAttributeUnspecified = 0,  //!< 未指定，默认值
    UISemanticContentAttributePlayback,         //!< 打开/ RW / FF等播放控制按钮
    UISemanticContentAttributeSpatial,          //!< 控制导致某种形式的定向改变UI中,如分段控制文本对齐方式或在游戏中方向键
    UISemanticContentAttributeForceLeftToRight, //!< 视图总是从左向右布局.
    UISemanticContentAttributeForceRightToLeft  //!< 视图总是从右向左布局.
} NS_ENUM_AVAILABLE_IOS(9_0);
 
@protocol UICoordinateSpace <NSObject>
 
/** 将像素point由point所在视图转换到目标视图view中，返回在目标视图view中的像素值 */
- (CGPoint)convertPoint:(CGPoint)point toCoordinateSpace:(id <UICoordinateSpace>)coordinateSpace NS_AVAILABLE_IOS(8_0);
/** 将像素point由point所在视图转换到目标视图view中，返回在目标视图view中的像素值 */
- (CGPoint)convertPoint:(CGPoint)point fromCoordinateSpace:(id <UICoordinateSpace>)coordinateSpace NS_AVAILABLE_IOS(8_0);
/** 将rect由rect所在视图转换到目标视图view中，返回在目标视图view中的rect */
- (CGRect)convertRect:(CGRect)rect toCoordinateSpace:(id <UICoordinateSpace>)coordinateSpace NS_AVAILABLE_IOS(8_0);
/** 将rect从view中转换到当前视图中，返回在当前视图中的rect */
- (CGRect)convertRect:(CGRect)rect fromCoordinateSpace:(id <UICoordinateSpace>)coordinateSpace NS_AVAILABLE_IOS(8_0);
 
/** 获取bounds */
@property (readonly, nonatomic) CGRect bounds NS_AVAILABLE_IOS(8_0);
 
@end
 
@class UIBezierPath, UIEvent, UIWindow, UIViewController, UIColor, UIGestureRecognizer, UIMotionEffect, CALayer, UILayoutGuide;
 
NS_CLASS_AVAILABLE_IOS(2_0) @interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, CALayerDelegate>
 
/** 返回主layer所使用的类 */
#if UIKIT_DEFINE_AS_PROPERTIES
@property(class, nonatomic, readonly) Class layerClass;
#else
+ (Class)layerClass;
#endif
 
/** 通过Frame初始化UI对象 */
- (instancetype)initWithFrame:(CGRect)frame NS_DESIGNATED_INITIALIZER;
/** 用于xib初始化 */
- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;
 
/** 设置用户交互，默认YES允许用户交互 */
@property(nonatomic,getter=isUserInteractionEnabled) BOOL userInteractionEnabled;
/** 控件标记(父控件可以通过tag找到对应的子控件)，默认为0 */
@property(nonatomic)                                 NSInteger tag;
/** 视图图层(可以用来设置圆角效果/阴影效果) */
@property(nonatomic,readonly,strong)                 CALayer  *layer;
 
/** 返回是否可以成为焦点, 默认NO */
#if UIKIT_DEFINE_AS_PROPERTIES
@property(nonatomic,readonly) BOOL canBecomeFocused NS_AVAILABLE_IOS(9_0);
#else
- (BOOL)canBecomeFocused NS_AVAILABLE_IOS(9_0);
#endif
/** 是否可以被聚焦 */
@property (readonly, nonatomic, getter=isFocused) BOOL focused NS_AVAILABLE_IOS(9_0);
 
/** 左右滑动翻转效果 */
@property (nonatomic) UISemanticContentAttribute semanticContentAttribute NS_AVAILABLE_IOS(9_0);
 
/** 获取视图的方向 */
+ (UIUserInterfaceLayoutDirection)userInterfaceLayoutDirectionForSemanticContentAttribute:(UISemanticContentAttribute)attribute NS_AVAILABLE_IOS(9_0);
 
/** 获取相对于指定视图的界面方向 */
+ (UIUserInterfaceLayoutDirection)userInterfaceLayoutDirectionForSemanticContentAttribute:(UISemanticContentAttribute)semanticContentAttribute relativeToLayoutDirection:(UIUserInterfaceLayoutDirection)layoutDirection NS_AVAILABLE_IOS(10_0);
 
/** 返回即时内容的布局的方向 */
@property (readonly, nonatomic) UIUserInterfaceLayoutDirection effectiveUserInterfaceLayoutDirection NS_AVAILABLE_IOS(10_0);
 
@end
 
@interface UIView(UIViewGeometry)
 
/** 位置和尺寸(以父控件的左上角为坐标原点(0, 0)) */
@property(nonatomic) CGRect            frame;
 
/** 位置和尺寸(以自己的左上角为坐标原点(0, 0)) */
@property(nonatomic) CGRect            bounds;
/** 中心点(以父控件的左上角为坐标原点(0, 0)) */
@property(nonatomic) CGPoint           center;
/** 变形属性(平移\缩放\旋转) */
@property(nonatomic) CGAffineTransform transform;
/** 视图内容的缩放比例 */
@property(nonatomic) CGFloat           contentScaleFactor NS_AVAILABLE_IOS(4_0);
 
/** 是否支持多点触摸，默认NO */
@property(nonatomic,getter=isMultipleTouchEnabled) BOOL multipleTouchEnabled __TVOS_PROHIBITED;
/** 是否独占整个Touch事件，默认NO */
@property(nonatomic,getter=isExclusiveTouch) BOOL       exclusiveTouch __TVOS_PROHIBITED;
 
/** 在指定点上点击测试指定事件 */
- (nullable UIView *)hitTest:(CGPoint)point withEvent:(nullable UIEvent *)event;
/** 判断当前的点击或者触摸事件的点是否在当前的view中，默认返回YES */
- (BOOL)pointInside:(CGPoint)point withEvent:(nullable UIEvent *)event;
 
/** 将像素point由point所在视图转换到目标视图view中，返回在目标视图view中的像素值 */
- (CGPoint)convertPoint:(CGPoint)point toView:(nullable UIView *)view;
/** 将像素point由point所在视图转换到目标视图view中，返回在目标视图view中的像素值 */
- (CGPoint)convertPoint:(CGPoint)point fromView:(nullable UIView *)view;
/** 将rect由rect所在视图转换到目标视图view中，返回在目标视图view中的rect */
- (CGRect)convertRect:(CGRect)rect toView:(nullable UIView *)view;
/** 将rect从view中转换到当前视图中，返回在当前视图中的rect */
- (CGRect)convertRect:(CGRect)rect fromView:(nullable UIView *)view;
 
/** 自动调整子视图尺寸，默认YES则会根据autoresizingMask属性自动调整子视图尺寸 */
@property(nonatomic) BOOL               autoresizesSubviews;
/** 自动调整子视图与父视图的位置，默认UIViewAutoresizingNone */
@property(nonatomic) UIViewAutoresizing autoresizingMask;
 
/** 返回“最佳”大小适合给定的大小 */
- (CGSize)sizeThatFits:(CGSize)size;
/** 调整为刚好合适子视图大小 */
- (void)sizeToFit;
 
@end
 
@interface UIView(UIViewHierarchy)
 
/** 获取父视图 */
@property(nullable, nonatomic,readonly) UIView       *superview;
/** 获取所有子视图 */
@property(nonatomic,readonly,copy) NSArray<__kindof UIView *> *subviews;
/** 获取视图所在的Window */
@property(nullable, nonatomic,readonly) UIWindow     *window;
 
/** 从父视图中移除控件 */
- (void)removeFromSuperview;
/** 插入子视图(将子视图插入到subviews数组中index这个位置) */
- (void)insertSubview:(UIView *)view atIndex:(NSInteger)index;
/** 交换subviews数组中所存放子视图的位置 */
- (void)exchangeSubviewAtIndex:(NSInteger)index1 withSubviewAtIndex:(NSInteger)index2;
 
/** 添加子视图(新添加的视图在subviews数组的后面, 显示在最上面) */
- (void)addSubview:(UIView *)view;
/** 插入子视图(将子视图插到siblingSubview之下) */
- (void)insertSubview:(UIView *)view belowSubview:(UIView *)siblingSubview;
/** 插入子视图(将子视图插到siblingSubview之上) */
- (void)insertSubview:(UIView *)view aboveSubview:(UIView *)siblingSubview;
 
/** 将子视图拉到最上面来显示 */
- (void)bringSubviewToFront:(UIView *)view;
/** 将子视图拉到最下面来显示 */
- (void)sendSubviewToBack:(UIView *)view;
 
##pragma mark - 系统自动调用(留给子类去实现)
/** 添加自视图完成后调用 */
- (void)didAddSubview:(UIView *)subview;
/** 将要移除自视图时调用 */
- (void)willRemoveSubview:(UIView *)subview;
 
/** 将要移动到新父视图时调用 */
- (void)willMoveToSuperview:(nullable UIView *)newSuperview;
/** 移动到新父视图完成后调用 */
- (void)didMoveToSuperview;
/** 将要移动到新Window时调用 */
- (void)willMoveToWindow:(nullable UIWindow *)newWindow;
/** 移动到新Window完成后调用 */
- (void)didMoveToWindow;
 
/** 判断view是否为子类 */
- (BOOL)isDescendantOfView:(UIView *)view;
/** 通过tag获得对应的子视图 */
- (nullable __kindof UIView *)viewWithTag:(NSInteger)tag;
 
/** 对现在有布局有调整更改后，使用这个方法进行更新 */
- (void)setNeedsLayout;
/** 强制进行更新layout */
- (void)layoutIfNeeded;
 
/** 控件的frame发生改变的时候就会调用,一般在这里重写布局子控件的位置和尺寸 */
- (void)layoutSubviews;
 
/** 设置view之间的间距，该属性只对autolayout布局有效 */
@property (nonatomic) UIEdgeInsets layoutMargins NS_AVAILABLE_IOS(8_0);
/** 是否将当前视图的间距和父视图相同，默认是NO */
@property (nonatomic) BOOL preservesSuperviewLayoutMargins NS_AVAILABLE_IOS(8_0);
/** 改变view的layoutMargins这个属性时，会触发这个方法 */
- (void)layoutMarginsDidChange NS_AVAILABLE_IOS(8_0);
 
/** 视图间距引导 */
@property(readonly,strong) UILayoutGuide *layoutMarginsGuide NS_AVAILABLE_IOS(9_0);
 
/** 获取此区域的内的布局引导 */
@property (nonatomic, readonly, strong) UILayoutGuide *readableContentGuide  NS_AVAILABLE_IOS(9_0);
@end
 
@interface UIView(UIViewRendering)
 
/** 重写drawRect方法，在可以这里进行绘图操作。*/
- (void)drawRect:(CGRect)rect;
 
/** 标记整个视图的边界矩形需要重绘, 调用这个方法会自动调用drawRect方法 */
- (void)setNeedsDisplay;
/** 标记在指定区域内的视图的边界需要重绘, 调用这个方法会自动调用drawRect方法 */
- (void)setNeedsDisplayInRect:(CGRect)rect;
 
/** 是否裁剪超出Bounds范围的子控件，默认NO */
@property(nonatomic)                 BOOL              clipsToBounds;
/** 设置背景颜色，默认nil */
@property(nullable, nonatomic,copy)  UIColor          *backgroundColor UI_APPEARANCE_SELECTOR;
/** 设置透明度(范围0.0~1.0)，默认1.0 */
@property(nonatomic)                 CGFloat           alpha;
/** 设置是否不透明，默认YES不透明 */
@property(nonatomic,getter=isOpaque) BOOL              opaque;
/** 视图重绘前是否先清理以前的内容，默认YES */
@property(nonatomic)                 BOOL              clearsContextBeforeDrawing;
/** 设置是否隐藏，默认NO不隐藏 */
@property(nonatomic,getter=isHidden) BOOL              hidden;
/** 内容显示的模式，默认UIViewContentModeScaleToFill */
@property(nonatomic)                 UIViewContentMode contentMode;
/** 拉伸属性，如图片拉伸 */
@property(nonatomic)                 CGRect            contentStretch NS_DEPRECATED_IOS(3_0,6_0) __TVOS_PROHIBITED;
 
/** 蒙板view */
@property(nullable, nonatomic,strong)          UIView           *maskView NS_AVAILABLE_IOS(8_0);
 
/** 改变应用程序的外观的颜色。默认为nil */
@property(null_resettable, nonatomic, strong) UIColor *tintColor NS_AVAILABLE_IOS(7_0);
 
/** 可以使tintColor变暗，因此整个视图层次变暗 */
@property(nonatomic) UIViewTintAdjustmentMode tintAdjustmentMode NS_AVAILABLE_IOS(7_0);
 
/** 覆盖这个方法的目的是为了当tintColor改变的时候自定义一些行为 */
- (void)tintColorDidChange NS_AVAILABLE_IOS(7_0);
 
@end
 
@interface UIView(UIViewAnimation)
 
/** 开始动画 */
+ (void)beginAnimations:(nullable NSString *)animationID context:(nullable void *)context;
/** 提交动画 */
+ (void)commitAnimations;
 
/** 设置动画代理, 默认nil */
+ (void)setAnimationDelegate:(nullable id)delegate;
/** 动画将要开始时执行方法（必须要先设置动画代理）, 默认NULL */
+ (void)setAnimationWillStartSelector:(nullable SEL)selector;
/** 动画已结束时执行方法（必须要先设置动画代理）, 默认NULL */
+ (void)setAnimationDidStopSelector:(nullable SEL)selector;
/** 设置动画时长, 默认0.2秒 */
+ (void)setAnimationDuration:(NSTimeInterval)duration;
/** 动画延迟执行时间, 默认0.0秒 */
+ (void)setAnimationDelay:(NSTimeInterval)delay;
/** 设置在动画块内部动画属性改变的开始时间, 默认now ([NSDate date]) */
+ (void)setAnimationStartDate:(NSDate *)startDate;
/** 设置动画曲线, 默认UIViewAnimationCurveEaseInOut */
+ (void)setAnimationCurve:(UIViewAnimationCurve)curve;
/** 动画的重复播放次数， 默认0 */
+ (void)setAnimationRepeatCount:(float)repeatCount;
/** 设置是否自定翻转当前的动画效果, 默认NO */
+ (void)setAnimationRepeatAutoreverses:(BOOL)repeatAutoreverses;
/** 设置动画从当前状态开始播放, 默认NO */
+ (void)setAnimationBeginsFromCurrentState:(BOOL)fromCurrentState;
 
/** 在动画块中为视图设置过渡动画 */
+ (void)setAnimationTransition:(UIViewAnimationTransition)transition forView:(UIView *)view cache:(BOOL)cache;
 
/** 设置是否激活动画 */
+ (void)setAnimationsEnabled:(BOOL)enabled;
/** 返回一个布尔值表示动画是否结束 */
#if UIKIT_DEFINE_AS_PROPERTIES
@property(class, nonatomic, readonly) BOOL areAnimationsEnabled;
#else
+ (BOOL)areAnimationsEnabled;
#endif
/** 先检查动画当前是否启用，然后禁止动画，执行block内的方法，最后重新启用动画，而且这个方法不会阻塞基于CoreAnimation的动画 */
+ (void)performWithoutAnimation:(void (NS_NOESCAPE ^)(void))actionsWithoutAnimation NS_AVAILABLE_IOS(7_0);
 
/** 当前动画的持续时间 */
#if UIKIT_DEFINE_AS_PROPERTIES
@property(class, nonatomic, readonly) NSTimeInterval inheritedAnimationDuration NS_AVAILABLE_IOS(9_0);
#else
+ (NSTimeInterval)inheritedAnimationDuration NS_AVAILABLE_IOS(9_0);
#endif
 
@end
 
@interface UIView(UIViewAnimationWithBlocks)
 
/** 用于对一个或多个视图的改变的持续时间、延时、选项动画完成时的操作 */
+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(4_0);
 
/** 用于对一个或多个视图的改变的持续时间、选项动画完成时的操作，默认：delay = 0.0, options = 0 */
+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(4_0);
 
/** 用于对一个或多个视图的改变的持续时间内动画完成时的操作，默认：delay = 0.0, options = 0, completion = NULL */
+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations NS_AVAILABLE_IOS(4_0);
 
/** 使用与物理弹簧运动相对应的定时曲线执行视图动画 */
+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay usingSpringWithDamping:(CGFloat)dampingRatio initialSpringVelocity:(CGFloat)velocity options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(7_0);
 
/** 为指定的容器视图创建转换动画 */
+ (void)transitionWithView:(UIView *)view duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options animations:(void (^ __nullable)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(4_0);
 
/** 使用给定的参数在指定视图之间创建转换动画 */
+ (void)transitionFromView:(UIView *)fromView toView:(UIView *)toView duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(4_0); // toView added to fromView.superview, fromView removed from its superview
 
/** 在一个或多个视图上执行指定的系统提供的动画，以及定义的可选并行动画 */
+ (void)performSystemAnimation:(UISystemAnimation)animation onViews:(NSArray<__kindof UIView *> *)views options:(UIViewAnimationOptions)options animations:(void (^ __nullable)(void))parallelAnimations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(7_0);
 
@end
 
/** UIView的关键帧动画 */
@interface UIView (UIViewKeyframeAnimations)
 
/** 创建一个动画块对象，可用于为当前视图设置基于关键帧的动画 */
+ (void)animateKeyframesWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewKeyframeAnimationOptions)options animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(7_0);
/** 添加指定开始时间、持续时间的关键帧动画(起始和持续时间是0.0和1.0之间的值) */
+ (void)addKeyframeWithRelativeStartTime:(double)frameStartTime relativeDuration:(double)frameDuration animations:(void (^)(void))animations NS_AVAILABLE_IOS(7_0);
 
@end
 
@interface UIView (UIViewGestureRecognizers)
 
/** 当前视图所附加的所有手势识别器 */
@property(nullable, nonatomic,copy) NSArray<__kindof UIGestureRecognizer *> *gestureRecognizers NS_AVAILABLE_IOS(3_2);
 
/** 添加一个手势识别器 */
- (void)addGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer NS_AVAILABLE_IOS(3_2);
/** 移除一个手势识别器 */
- (void)removeGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer NS_AVAILABLE_IOS(3_2);
 
/** 开始一个手势识别器 */
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer NS_AVAILABLE_IOS(6_0);
 
@end
 
@interface UIView (UIViewMotionEffects)
 
/** 添加运动效果，当倾斜设备时视图稍微改变其位置 */
- (void)addMotionEffect:(UIMotionEffect *)effect NS_AVAILABLE_IOS(7_0);
 
/** 移除运动效果 */
- (void)removeMotionEffect:(UIMotionEffect *)effect NS_AVAILABLE_IOS(7_0);
 
/** 所有添加的运动效果 */
@property (copy, nonatomic) NSArray<__kindof UIMotionEffect *> *motionEffects NS_AVAILABLE_IOS(7_0);
 
@end
 
 
typedef NS_ENUM(NSInteger, UILayoutConstraintAxis) {
    UILayoutConstraintAxisHorizontal = 0,   //!< 水平约束.
    UILayoutConstraintAxisVertical = 1      //!< 竖直约束.
};
 
 
@interface UIView (UIConstraintBasedLayoutInstallingConstraints)
 
/** 获取所有约束 */
@property(nonatomic,readonly) NSArray<__kindof NSLayoutConstraint *> *constraints NS_AVAILABLE_IOS(6_0);
 
/** 添加一个约束 */
- (void)addConstraint:(NSLayoutConstraint *)constraint NS_AVAILABLE_IOS(6_0);
/** 添加多个约束 */
- (void)addConstraints:(NSArray<__kindof NSLayoutConstraint *> *)constraints NS_AVAILABLE_IOS(6_0);
/** 移除一个约束 */
- (void)removeConstraint:(NSLayoutConstraint *)constraint NS_AVAILABLE_IOS(6_0);
/** 移除多个约束 */
- (void)removeConstraints:(NSArray<__kindof NSLayoutConstraint *> *)constraints NS_AVAILABLE_IOS(6_0);
@end
 
 
@interface UIView (UIConstraintBasedLayoutCoreMethods)
/** 更新视图和其子视图的约束 */
- (void)updateConstraintsIfNeeded NS_AVAILABLE_IOS(6_0);
/** 为视图更新约束，可以重写这个方法来设置当前view局部的布局约束 */
- (void)updateConstraints NS_AVAILABLE_IOS(6_0) NS_REQUIRES_SUPER;
/** 视图的约束是否需要更新 */
- (BOOL)needsUpdateConstraints NS_AVAILABLE_IOS(6_0);
/** 设置视图的约束需要更新，调用这个方法，系统会调用updateConstraints去更新布局 */
- (void)setNeedsUpdateConstraints NS_AVAILABLE_IOS(6_0);
@end
 
 
@interface UIView (UIConstraintBasedCompatibility)
 
/** 是否启用自动布局约束，默认YES. IB默认是NO */
@property(nonatomic) BOOL translatesAutoresizingMaskIntoConstraints NS_AVAILABLE_IOS(6_0);
 
/** 是否使用约束布局 */
#if UIKIT_DEFINE_AS_PROPERTIES
@property(class, nonatomic, readonly) BOOL requiresConstraintBasedLayout NS_AVAILABLE_IOS(6_0);
#else
+ (BOOL)requiresConstraintBasedLayout NS_AVAILABLE_IOS(6_0);
#endif
 
@end
 
 
@interface UIView (UIConstraintBasedLayoutLayering)
 
/** 返回给定框架的视图的对齐矩阵 */
- (CGRect)alignmentRectForFrame:(CGRect)frame NS_AVAILABLE_IOS(6_0);
/** 返回给定对齐矩形的视图的frame */
- (CGRect)frameForAlignmentRect:(CGRect)alignmentRect NS_AVAILABLE_IOS(6_0);
 
/** 返回从视图的frame上定义的对齐矩阵的边框 */
#if UIKIT_DEFINE_AS_PROPERTIES
@property(nonatomic, readonly) UIEdgeInsets alignmentRectInsets NS_AVAILABLE_IOS(6_0);
#else
- (UIEdgeInsets)alignmentRectInsets NS_AVAILABLE_IOS(6_0);
#endif
 
/** 返回满足基线约束条件的视图 */
- (UIView *)viewForBaselineLayout NS_DEPRECATED_IOS(6_0, 9_0, "Override -viewForFirstBaselineLayout or -viewForLastBaselineLayout as appropriate, instead") __TVOS_PROHIBITED;
 
/** 返回用于满足第一基线约束的视图 */
@property(readonly,strong) UIView *viewForFirstBaselineLayout NS_AVAILABLE_IOS(9_0);
 
/** 返回用于满足上次基线约束的视图 */
@property(readonly,strong) UIView *viewForLastBaselineLayout NS_AVAILABLE_IOS(9_0);
 
 
UIKIT_EXTERN const CGFloat UIViewNoIntrinsicMetric NS_AVAILABLE_IOS(6_0); // -1
/** 返回接收对象的原本大小 */
#if UIKIT_DEFINE_AS_PROPERTIES
@property(nonatomic, readonly) CGSize intrinsicContentSize NS_AVAILABLE_IOS(6_0);
#else
- (CGSize)intrinsicContentSize NS_AVAILABLE_IOS(6_0);
#endif
/** 废除视图原本内容的size */
- (void)invalidateIntrinsicContentSize NS_AVAILABLE_IOS(6_0);
 
/** 设置当视图要变大时，视图的压缩改变方式，返回一个优先权（确定view有多大的优先级阻止自己变大） */
- (UILayoutPriority)contentHuggingPriorityForAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(6_0);
/** 设置放先权 */
- (void)setContentHuggingPriority:(UILayoutPriority)priority forAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(6_0);
 
/** 设置当视图要变小时，视图的压缩改变方式，是水平缩小还是垂直缩小，并返回一个优先权（确定有多大的优先级阻止自己变小） */
- (UILayoutPriority)contentCompressionResistancePriorityForAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(6_0);
/** 设置优先权 */
- (void)setContentCompressionResistancePriority:(UILayoutPriority)priority forAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(6_0);
@end
 
// Size To Fit
 
UIKIT_EXTERN const CGSize UILayoutFittingCompressedSize NS_AVAILABLE_IOS(6_0);
UIKIT_EXTERN const CGSize UILayoutFittingExpandedSize NS_AVAILABLE_IOS(6_0);
 
@interface UIView (UIConstraintBasedLayoutFittingSize)
/** 返回满足持有约束的视图的size */
- (CGSize)systemLayoutSizeFittingSize:(CGSize)targetSize NS_AVAILABLE_IOS(6_0);
/** 返回满足它所包含的约束的视图的大小 */
- (CGSize)systemLayoutSizeFittingSize:(CGSize)targetSize withHorizontalFittingPriority:(UILayoutPriority)horizontalFittingPriority verticalFittingPriority:(UILayoutPriority)verticalFittingPriority NS_AVAILABLE_IOS(8_0);
@end
 
@interface UIView (UILayoutGuideSupport)
 
/** 此视图拥有布局向导对象的数组 */
@property(nonatomic,readonly,copy) NSArray<__kindof UILayoutGuide *> *layoutGuides NS_AVAILABLE_IOS(9_0);
 
/** 向视图中添加布局向导 */
- (void)addLayoutGuide:(UILayoutGuide *)layoutGuide NS_AVAILABLE_IOS(9_0);
 
/** 向视图中添加布局向导 */
- (void)removeLayoutGuide:(UILayoutGuide *)layoutGuide NS_AVAILABLE_IOS(9_0);
@end
 
@class NSLayoutXAxisAnchor,NSLayoutYAxisAnchor,NSLayoutDimension;
@interface UIView (UIViewLayoutConstraintCreation)
/** 布局视图的前缘框的布局锚点 */
@property(readonly, strong) NSLayoutXAxisAnchor *leadingAnchor NS_AVAILABLE_IOS(9_0);
/** 布局视图的后缘边框的布局锚点 */
@property(readonly, strong) NSLayoutXAxisAnchor *trailingAnchor NS_AVAILABLE_IOS(9_0);
/** 布局视图的左边框的布局锚点 */
@property(readonly, strong) NSLayoutXAxisAnchor *leftAnchor NS_AVAILABLE_IOS(9_0);
/** 布局视图的右边框的布局锚点 */
@property(readonly, strong) NSLayoutXAxisAnchor *rightAnchor NS_AVAILABLE_IOS(9_0);
/** 布局视图的顶边框的布局锚点 */
@property(readonly, strong) NSLayoutYAxisAnchor *topAnchor NS_AVAILABLE_IOS(9_0);
/** 布局视图的底边框的布局锚点 */
@property(readonly, strong) NSLayoutYAxisAnchor *bottomAnchor NS_AVAILABLE_IOS(9_0);
/** 布局视图的宽度 */
@property(readonly, strong) NSLayoutDimension *widthAnchor NS_AVAILABLE_IOS(9_0);
/** 布局视图的高度 */
@property(readonly, strong) NSLayoutDimension *heightAnchor NS_AVAILABLE_IOS(9_0);
/** 布局视图的水平中心轴 */
@property(readonly, strong) NSLayoutXAxisAnchor *centerXAnchor NS_AVAILABLE_IOS(9_0);
/** 布局视图的垂直中心轴 */
@property(readonly, strong) NSLayoutYAxisAnchor *centerYAnchor NS_AVAILABLE_IOS(9_0);
/** 一个代表对视图中的文本的最高线基线布置锚 */
@property(readonly, strong) NSLayoutYAxisAnchor *firstBaselineAnchor NS_AVAILABLE_IOS(9_0);
/** 一个代表对视图中的文本的最低线基线布置锚 */
@property(readonly, strong) NSLayoutYAxisAnchor *lastBaselineAnchor NS_AVAILABLE_IOS(9_0);
 
@end
 
@interface UIView (UIConstraintBasedLayoutDebugging)
 
/** 获得实体在不同方向上所有的布局约束 */
- (NSArray<__kindof NSLayoutConstraint *> *)constraintsAffectingLayoutForAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(6_0);
 
/** 可以知道当前视图的布局是否会有歧义 */
#if UIKIT_DEFINE_AS_PROPERTIES
@property(nonatomic, readonly) BOOL hasAmbiguousLayout NS_AVAILABLE_IOS(6_0);
#else
- (BOOL)hasAmbiguousLayout NS_AVAILABLE_IOS(6_0);
#endif
 
/** 这个方法会随机改变视图的layout到另外一个有效的layout。这样我们就可以很清楚的看到哪一个layout导致了整体的布局约束出现了错误，或者我们应该增加更多的布局约束 */
- (void)exerciseAmbiguityInLayout NS_AVAILABLE_IOS(6_0);
@end
 
/** 约束调试，只在DEBUG环境下被调用 */
@interface UILayoutGuide (UIConstraintBasedLayoutDebugging)
 
/** 获得实体在不同方向上所有的布局约束 */
- (NSArray<__kindof NSLayoutConstraint *> *)constraintsAffectingLayoutForAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(10_0);
 
/** 可以知道当前视图的布局是否会有歧义 */
#if UIKIT_DEFINE_AS_PROPERTIES
@property(nonatomic, readonly) BOOL hasAmbiguousLayout NS_AVAILABLE_IOS(10_0);
#else
- (BOOL)hasAmbiguousLayout NS_AVAILABLE_IOS(10_0);
#endif
@end
 
#pragma mark - View状态保存恢复
@interface UIView (UIStateRestoration)
/** 标示是否支持保存,恢复视图状态信息 */
@property (nullable, nonatomic, copy) NSString *restorationIdentifier NS_AVAILABLE_IOS(6_0);
/** 保存视图状态相关的信息 */
- (void) encodeRestorableStateWithCoder:(NSCoder *)coder NS_AVAILABLE_IOS(6_0);
/** 恢复和保持视图状态相关信息 */
- (void) decodeRestorableStateWithCoder:(NSCoder *)coder NS_AVAILABLE_IOS(6_0);
@end
 
#pragma mark - View快照
@interface UIView (UISnapshotting)
/** 将当前显示的view截取成一个新的view */
- (nullable UIView *)snapshotViewAfterScreenUpdates:(BOOL)afterUpdates NS_AVAILABLE_IOS(7_0);
/** 缩放一个view默认是从中心点进行缩放的 */
- (nullable UIView *)resizableSnapshotViewFromRect:(CGRect)rect afterScreenUpdates:(BOOL)afterUpdates withCapInsets:(UIEdgeInsets)capInsets NS_AVAILABLE_IOS(7_0);
/** 屏幕快照 */
- (BOOL)drawViewHierarchyInRect:(CGRect)rect afterScreenUpdates:(BOOL)afterUpdates NS_AVAILABLE_IOS(7_0);
@end
 
NS_ASSUME_NONNULL_END