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。
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//1
CGRect frame=self.testView.frame;
frame.size.width=120;
self.testView.frame=frame;
[self printFrame];
//2
self.testView.width=120;
[self printFrame];
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扩展定义:
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@
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
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扩展实现:
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@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
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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
