【OBJC类扩展之尺寸】UIView+Size
#import <UIKit/UIKit.h> @interface UIView (Size) @property (nonatomic, assign) CGSize size; @property (nonatomic, assign) CGFloat left;@property (nonatomic, assign) CGFloat right;@property (nonatomic, assign) CGFloat top;@property (nonatomic, assign) CGFloat bottom; @property (nonatomic, assign) CGFloat centerX;@property (nonatomic, assign) CGFloat centerY; @property (nonatomic, assign) CGFloat width;@property (nonatomic, assign) CGFloat height; @end#import "UIView+Size.h" @implementation UIView (Size) - (void)setSize:(CGSize)size;{ CGPoint origin = [self frame].origin; [self setFrame:CGRectMake(origin.x, origin.y, size.width, size.height)];} - (CGSize)size;{ return [self frame].size;} - (CGFloat)left;{ return CGRectGetMinX([self frame]);} - (void)setLeft:(CGFloat)x;{ CGRect frame = [self frame]; frame.origin.x = x; [self setFrame:frame];} - (CGFloat)top;{ return CGRectGetMinY([self frame]);} - (void)setTop:(CGFloat)y;{ CGRect frame = [self frame]; frame.origin.y = y; [self setFrame:frame];} - (CGFloat)right;{ return CGRectGetMaxX([self frame]);} - (void)setRight:(CGFloat)right;{ CGRect frame = [self frame]; frame.origin.x = right - frame.size.width; [self setFrame:frame];} - (CGFloat)bottom;{ return CGRectGetMaxY([self frame]);} - (void)setBottom:(CGFloat)bottom;{ CGRect frame = [self frame]; frame.origin.y = bottom - frame.size.height; [self setFrame:frame];} - (CGFloat)centerX;{ return [self center].x;} - (void)setCenterX:(CGFloat)centerX;{ [self setCenter:CGPointMake(centerX, self.center.y)];} - (CGFloat)centerY;{ return [self center].y;} - (void)setCenterY:(CGFloat)centerY;{ [self setCenter:CGPointMake(self.center.x, centerY)];} - (CGFloat)width;{ return CGRectGetWidth([self frame]);} - (void)setWidth:(CGFloat)width;{ CGRect frame = [self frame]; frame.size.width = width; [self setFrame:CGRectStandardize(frame)];} - (CGFloat)height;{ return CGRectGetHeight([self frame]);} - (void)setHeight:(CGFloat)height;{ CGRect frame = [self frame]; frame.size.height = height; [self setFrame:CGRectStandardize(frame)];} @end