iOS列表视频播放，模仿网易视频和今日头条视频

/* Erica Sadun, http://ericasadun.com iPhone Developer's Cookbook, 3.0 Edition BSD License, Use at your own risk Created by wxxu on 14-08-07. */ #import <UIKit/UIKit.h> CGPoint CGRectGetCenter(CGRect rect); CGRect CGRectMoveToCenter(CGRect rect, CGPoint center); @interface UIView (ViewFrameGeometry) @property CGPoint origin; @property CGSize size; @property (nonatomic,readonly, assign) CGPoint bottomLeft; @property (nonatomic,readonly, assign) CGPoint bottomRight; @property (nonatomic,readonly, assign) CGPoint topRight; @property (nonatomic,readonly, assign) CGPoint topLeft; @property (nonatomic, assign) CGFloat height; @property (nonatomic, assign) CGFloat width; @property (nonatomic, assign) CGFloat top; @property (nonatomic, assign) CGFloat left; @property (nonatomic, assign) CGFloat bottom; @property (nonatomic, assign) CGFloat right; @property (nonatomic, assign) CGFloat x; @property (nonatomic, assign) CGFloat y; //bounds accessors @property (nonatomic, assign) CGSize boundsSize; @property (nonatomic, assign) CGFloat boundsWidth; @property (nonatomic, assign) CGFloat boundsHeight; //content getters @property (nonatomic, readonly) CGRect contentBounds; @property (nonatomic, readonly) CGPoint contentCenter; //animation - (void)crossfadeWithDuration:(NSTimeInterval)duration; - (void)crossfadeWithDuration:(NSTimeInterval)duration completion:(void (^)(void))completion; - (void) moveBy: (CGPoint) delta; - (void) scaleBy: (CGFloat) scaleFactor; - (void) fitInSize: (CGSize) aSize; @end