一个实用的UIView的类别

//
//  FrameAccessor.h
//  FrameAccessor
//
//  Created by Alex Denisov on 18.03.12.
//  Copyright (c) 2013 okolodev.org. All rights reserved.
//

#if (TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE)
   #import <UIKit/UIKit.h>
   #define View UIView
#else
   #import <Foundation/Foundation.h>
   #define View NSView
#endif

@interface UIView (FrameAccessor)

- (CGPoint)origin;
- (void)setOrigin:(CGPoint)newOrigin;
- (CGSize)size;
- (void)setSize:(CGSize)newSize;

- (CGFloat)x;
- (void)setX:(CGFloat)newX;
- (CGFloat)y;
- (void)setY:(CGFloat)newY;

- (CGFloat)height;
- (void)setHeight:(CGFloat)newHeight;
- (CGFloat)width;
- (void)setWidth:(CGFloat)newWidth;

- (CGFloat)bottom;
- (CGFloat)right;

@end

//  FrameAccessor.m
//  FrameAccessor
//
//  Created by Alex Denisov on 18.03.12.
//  Copyright (c) 2013 okolodev.org. All rights reserved.
//

#import "FrameAccessor.h"

@implementation UIView (FrameAccessor)

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

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

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

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

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

- (void)setX:(CGFloat)newX {
   CGRect newFrame = self.frame;
   newFrame.origin.x = newX;
   self.frame = newFrame;
}

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

- (void)setY:(CGFloat)newY {
   CGRect newFrame = self.frame;
   newFrame.origin.y = newY;
   self.frame = newFrame;
}

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

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

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

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

- (CGFloat)bottom {
   return self.frame.origin.y + self.frame.size.height;
}

- (CGFloat)right {
   return self.frame.origin.x + self.frame.size.width;
}

@end