UIView扩展--方便控件的布局

.h文件

#import <UIKit/UIKit.h>

@interface UIView (Layout)

@property (nonatomic, assign) CGFloat originalX;//视图左上角的X值
@property (nonatomic, assign) CGFloat originalY;//视图左上角的Y值
@property (nonatomic, assign, readonly) CGFloat maxX;//视图右下角的X值
@property (nonatomic, assign, readonly) CGFloat maxY;//视图右下角的Y值
@property (nonatomic, assign) CGFloat width;//视图的宽
@property (nonatomic, assign) CGFloat height;//视图的高
@property (nonatomic, assign) CGSize viewSize;//视图的宽和高
@property (nonatomic, assign) CGFloat centerPointX;//中心位置的X坐标
@property (nonatomic, assign) CGFloat centerPointY;//中心位置的Y坐标

@end

.m文件

#import "UIView+Layout.h"

@implementation UIView (Layout)

//setting Methods
- (void)setOriginalX:(CGFloat)originalX
{
CGRect frame = self.frame;
frame.origin.x = originalX;
self.frame = frame;
}

- (void)setOriginalY:(CGFloat)originalY
{
CGRect frame = self.frame;
frame.origin.y = originalY;
self.frame = frame;
}

- (void)setWidth:(CGFloat)width
{
CGRect frame = self.frame;
frame.size.width = width;
self.frame = frame;
}

- (void)setHeight:(CGFloat)height
{
CGRect frame = self.frame;
frame.size.height = height;
self.frame = frame;
}

- (void)setViewSize:(CGSize)viewSize
{
CGRect frame = self.frame;
frame.size = viewSize;
self.frame = frame;
}

- (void)setCenterPointX:(CGFloat)centerPointX
{
self.center = CGPointMake(centerPointX, self.center.y);
}

- (void)setCenterPointY:(CGFloat)centerPointY
{
self.center = CGPointMake(self.center.x, centerPointY);
}

//getting Methods

- (CGFloat)originalX
{
return self.frame.origin.x;
}

- (CGFloat)originalY
{
return self.frame.origin.y;
}

- (CGFloat)maxX
{
return CGRectGetMaxX(self.frame);
}

- (CGFloat)maxY
{
return CGRectGetMaxY(self.frame);
}

- (CGFloat)width
{
return self.frame.size.width;
}

- (CGFloat)height
{
return self.frame.size.height;
}

- (CGSize)viewSize
{
return self.bounds.size;
}

- (CGFloat)centerPointX
{
return self.center.x;
}

- (CGFloat)centerPointY
{
return self.center.y;
}

@end