iOS开发-UIImage的常用分类

//

//  UIImage+ZZ.h

//  ZZ_APP主流框架

//

//  Created by ZZ_Macpro on 15/9/25.

//  Copyright (c) 2015年 ZZ_Macpro. All rights reserved.

//

 

#import <UIKit/UIKit.h>

 

@interface UIImage (ZZ)

/**

 *  返回一张没有渲染的原始图片

 *

 *  @param name 文件名

 */

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

 

/**

 *  加载图片

 *

 *  @param name 图片名

 */

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

 

/**

 *  返回一张自由拉伸的图片

 */

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

 

/**

 *   返回能够自由拉伸不变形的图片

 *

 *  @param name      文件名

 *  @param leftScale 左边需要保护的比例（0~1）

 */

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

@end

 

 

//

//  UIImage+ZZ.m

//  ZZ_APP主流框架

//

//  Created by ZZ_Macpro on 15/9/25.

//  Copyright (c) 2015年 ZZ_Macpro. All rights reserved.

//

 

#import "UIImage+ZZ.h"

 

@implementation UIImage (ZZ)

 

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

{

    if (iOS7) {

        return [[self imageWithName:name] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

    } else {

        return [self imageWithName:name];

    }

}

 

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

{

    if (iOS7) {

        NSString *newName = [name stringByAppendingString:@"_os7"];

        

        // 利用新的文件名加载图片

        UIImage *image = [self imageNamed:newName];

        // 不存在这张图片

        if (image == nil) {

            image = [self imageNamed:name];

        }

        return image;

    } else {

        return [self imageNamed:name];

    }

}

 

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

{

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

}

 

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

{

    UIImage *image = [self imageWithName:name];

    

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

}

@end