UIView中frame的封装(方便使用x,y,width,height,center,size等)

　　新建一个继承自UIView的分类

　　在.h文件中写代码：

@property (assign, nonatomic)CGSize size;
@property (assign, nonatomic)CGFloat width;
@property (assign, nonatomic)CGFloat height;
@property (assign, nonatomic)CGFloat x;
@property (assign, nonatomic)CGFloat y;
@property (assign, nonatomic)CGFloat centerX;
@property (assign, nonatomic)CGFloat centerY;

　　在.m文件中

- (void)setSize:(CGSize)size
{
    CGRect frame = self.frame;
    frame.size = size;
    self.frame = frame;
}
- (CGSize)size
{
    return self.frame.size;
}

- (void)setWidth:(CGFloat)width
{
    CGRect frame = self.frame;
    frame.size.width = width;
    self.frame = frame;
}
- (CGFloat)width
{
    return self.frame.size.width;
}
- (void)setHeight:(CGFloat)height
{
    CGRect frame = self.frame;
    frame.size.height = height;
    self.frame = frame;
}
- (void)setX:(CGFloat)x
{
    CGRect frame = self.frame;
    frame.origin.x = x;
    self.frame = frame;
}
- (void)setY:(CGFloat)y
{
    CGRect frame = self.frame;
    frame.origin.y = y;
    self.frame = frame;
}

- (CGFloat)height
{
    return self.frame.size.height;
}
- (CGFloat)x
{
    return self.frame.origin.x;
}
- (CGFloat)y
{
    return self.frame.origin.y;
}
- (void)setCenterX:(CGFloat)centerX
{
    CGPoint center = self.center;
    center.x = centerX;
    self.center = center;
}
- (void)setCenterY:(CGFloat)centerY
{
    CGPoint center = self.center;
    center.y = centerY;
    self.center = center;
}
- (CGFloat)centerX
{
    return self.center.x;
}
- (CGFloat)centerY
{
    return self.center.y;
}

　　如果把它导入放到PCH文件中，则整个项目所有文件夹都可以直接使用，比如想设置某个控件的尺寸：

button.x　　button.y　　button.width  label.centerX　　label.size等等，所以上面封装过的属性都可以直接点出来