在IOS开发中常常涉及到frame的修改，但是修改frame有时很烦，所以给UIView添加一个Category，然后添加到pch文件中去，这样就很方便了。

.h文件

//  UIView+Extension.h
#import <UIKit/UIKit.h>

@interface UIView (Extension)
@property (nonatomic, assign) CGFloat x;
@property (nonatomic, assign) CGFloat y;
@property (nonatomic, assign) CGFloat centerX;
@property (nonatomic, assign) CGFloat centerY;
@property (nonatomic, assign) CGFloat width;
@property (nonatomic, assign) CGFloat height;
@property (nonatomic, assign) CGSize size;
@property (nonatomic, assign) CGPoint origin;
@end

.m文件

//  UIView+Extension.m

#import "UIView+Extension.h"

@implementation UIView (Extension)

- (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)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;
}

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

- (void)setCenterY:(CGFloat)centerY
{
    CGPoint center = self.center;
    center.y = centerY;
    self.center = center;
}

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

- (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;
}

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

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

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

- (CGSize)size
{
    return self.frame.size;
}

- (void)setOrigin:(CGPoint)origin
{
    CGRect frame = self.frame;
    frame.origin = origin;
    self.frame = frame;
}

- (CGPoint)origin
{
    return self.frame.origin;
}
@end