iOS开发-UIView扩展CGRect
关于UIView的位置都会遇到，一般需要改变UIView的位置，需要先获取原有的frame位置，然后在frame上面修改，有的时候如果只是改变了一下垂直方向的位置，宽度和高度的一种，这种写法很麻烦。下面两种写法第二种明显更简单，如果需要实现第二种方法就需要扩展UIView。 1 2 3 4 5 6 7 8 //1 CGRect frame=self.testView.frame; frame.size.width=120; self.testView.frame=frame; [self printFrame]; //2 self.testView.width=120; [self printFrame]; 扩展定义: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 @ interface UIView (ReSize) @property (nonatomic, assign) CGSize size; @property (nonatomic,assign) CGFloat x; @property (nonatomic,assign) CGFloat y; @property (nonatomic, assign) CGFloat top; @property (nonatomic, assign) CGFloat bottom; @property (nonatomic, assign) CGFloat left; @property (nonatomic, assign) CGFloat right; @property (nonatomic, assign) CGFloat centerX; @property (nonatomic, assign) CGFloat centerY; @property (nonatomic, assign) CGFloat width; @property (nonatomic, assign) CGFloat height; @end 扩展实现: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 @implementation UIView (ReSize) - (CGSize)size; { return [self frame].size; } - ( void )setSize:(CGSize)size; { CGPoint origin = [self frame].origin; [self setFrame:CGRectMake(origin.x, origin.y, size.width, size.height)]; } -(CGFloat)x{ CGRect frame=[self frame]; return frame.origin.x; } -( void )setX:(CGFloat)x{ CGRect frame=[self frame]; frame.origin.x=x; [self setFrame:frame]; } -(CGFloat)y{ CGRect frame=[self frame]; return frame.origin.y; } -( void )setY:(CGFloat)y{ CGRect frame=[self frame]; frame.origin.y=y; return [self setFrame:frame]; } - (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 项目源代码地址:https://github.com/SmallElephant/iOS-FEViewReSize 本文转自Fly_Elephant博客园博客，原文链接：http://www.cnblogs.com/xiaofeixiang/p/5119677.html，如需转载请自行联系原作者
