47.小项目：QQ聊天界面 L部分

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---------- UIImage+CZHelp.h ----------

#import <UIKit/UIKit.h>

@interface UIImage (CZHelp)

+ (UIImage *)resizedImageNamed:(NSString *)name leftScale:(CGFloat)leftScale topScale:(CGFloat)topScale;

+ (UIImage *)resizedImageNamed:(NSString *)name;

@end

---------- UIImage+CZHelp.m ----------

#import "UIImage+CZHelp.h"

@implementation UIImage (CZHelp)

+ (UIImage *)resizedImageNamed:(NSString *)name

{

    return [self resizedImageNamed:name leftScale:0.5 topScale:0.5];

}

+ (UIImage *)resizedImageNamed:(NSString *)name leftScale:(CGFloat)leftScale topScale:(CGFloat)topScale

{

    UIImage *image = [UIImage imageNamed:name];

    return [image stretchableImageWithLeftCapWidth:image.size.width * leftScale topCapHeight:image.size.height * topScale];

}

@end

47.小项目：QQ聊天界面 L部分

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原文地址：http://www.cnblogs.com/lixiang2015/p/4719815.html