在UIView 的category中添加 下列方法，可以简单的得到view.x view.y view.width … 的信息 。 不需要 在冗长的写成 view.frame.size.width 这样大大简化了得到view 的frame的信息的过程
.h文件中
@interface UIView (Extension)@PRoperty (assign, nonatomic) CGFloat top;@property (assign, nonatomic) CGFloat bottom;@property (assign, nonatomic) CGFloat left;@property (assign, nonatomic) CGFloat right;@property (assign, nonatomic) CGPoint offset;@property (assign, nonatomic) CGPoint position;@property (assign, nonatomic) CGFloat x;@property (assign, nonatomic) CGFloat y;@property (assign, nonatomic) CGFloat w;@property (assign, nonatomic) CGFloat h;@property (assign, nonatomic) CGFloat width;@property (assign, nonatomic) CGFloat height;@property (assign, nonatomic) CGSize size;@property (assign, nonatomic) CGFloat centerX;@property (assign, nonatomic) CGFloat centerY;@property (assign, nonatomic) CGPoint origin;@property (readonly, nonatomic) CGPoint boundsCenter;@end.m文件中 的代码
#import "UIView+Extension.h"@implementation UIView (Extension)@dynamic top;@dynamic bottom;@dynamic left;@dynamic right;@dynamic width;@dynamic height;@dynamic offset;@dynamic position;@dynamic size;@dynamic x;@dynamic y;@dynamic w;@dynamic h;- (CGFloat)top{ return self.frame.origin.y;}- (void)setTop:(CGFloat)top{ CGRect frame = self.frame; frame.origin.y = top; self.frame = frame;}- (CGFloat)left{ return self.frame.origin.x;}- (void)setLeft:(CGFloat)left{ CGRect frame = self.frame; frame.origin.x = left; self.frame = frame;}- (CGFloat)width{ return self.frame.size.width;}- (void)setWidth:(CGFloat)width{ CGRect frame = self.frame; frame.size.width = width; self.frame = frame;}- (CGFloat)height{ return self.frame.size.height;}- (void)setHeight:(CGFloat)height{ CGRect frame = self.frame; frame.size.height = height; self.frame = frame;}- (CGFloat)bottom{ return self.frame.size.height + self.frame.origin.y;}- (void)setBottom:(CGFloat)bottom{ CGRect frame = self.frame; frame.origin.y = bottom - frame.size.height; self.frame = frame;}- (CGFloat)right{ return self.frame.size.width + self.frame.origin.x;}- (void)setRight:(CGFloat)right{ CGRect frame = self.frame; frame.origin.x = right - frame.size.width; self.frame = frame;}- (CGFloat)x{ return self.frame.origin.x;}- (void)setX:(CGFloat)value{ CGRect frame = self.frame; frame.origin.x = value; self.frame = frame;}- (CGFloat)y{ return self.frame.origin.y;}- (void)setY:(CGFloat)value{ CGRect frame = self.frame; frame.origin.y = value; self.frame = frame;}- (CGFloat)w{ return self.frame.size.width;}- (void)setW:(CGFloat)width{ CGRect frame = self.frame; frame.size.width = width; self.frame = frame;}- (CGFloat)h{ return self.frame.size.height;}- (void)setH:(CGFloat)height{ CGRect frame = self.frame; frame.size.height = height; self.frame = frame;}- (CGPoint)offset{ CGPoint point = CGPointZero; UIView * view = self; while ( view ) { point.x += view.frame.origin.x; point.y += view.frame.origin.y; view = view.superview; } return point;}- (void)setOffset:(CGPoint)offset{ UIView * view = self; if ( nil == view ) return; CGPoint point = offset; while ( view ) { point.x += view.superview.frame.origin.x; point.y += view.superview.frame.origin.y; view = view.superview; } CGRect frame = self.frame; frame.origin = point; self.frame = frame;}- (CGPoint)position{ return self.frame.origin;}- (void)setPosition:(CGPoint)pos{ CGRect frame = self.frame; frame.origin = pos; self.frame = frame;}- (CGSize)size{ return self.frame.size;}- (void)setSize:(CGSize)size{ CGRect frame = self.frame; frame.size = size; self.frame = frame;}- (CGFloat)centerX{ return self.center.x;}- (void)setCenterX:(CGFloat)centerX{ CGPoint center = self.center; center.x = centerX; self.center = center;}- (CGFloat)centerY{ return self.center.y;}- (void)setCenterY:(CGFloat)centerY{ CGPoint center = self.center; center.y = centerY; self.center = center;}- (CGPoint)origin{ return self.frame.origin;}- (void)setOrigin:(CGPoint)origin{ CGRect frame = self.frame; frame.origin = origin; self.frame = frame;}- (CGPoint)boundsCenter{ return CGPointMake( CGRectGetMidX(self.bounds), CGRectGetMidY(self.bounds) );}@end新闻热点
疑难解答
