iOS 保存和获取本地图片的封装函数

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//将图片保存到本地+ (void)SaveImageToLocal:(UIImage*)image Keys:(NSString*)key {    NSUserDefaults* preferences = [NSUserDefaults standardUserDefaults];    //[preferences persistentDomainForName:LocalPath];    [preferences setObject:UIImagePNGRepresentation(image) forKey:key];}//本地是否有相关图片+ (BOOL)LocalHaveImage:(NSString*)key {    NSUserDefaults* preferences = [NSUserDefaults standardUserDefaults];    //[preferences persistentDomainForName:LocalPath];    NSData* imageData = [preferences objectForKey:key];    if (imageData) {        return YES;    }    return NO;}//从本地获取图片+ (UIImage*)GetImageFromLocal:(NSString*)key {    NSUserDefaults* preferences = [NSUserDefaults standardUserDefaults];    //[preferences persistentDomainForName:LocalPath];    NSData* imageData = [preferences objectForKey:key];    UIImage* image;    if (imageData) {        image = [UIImage imageWithData:imageData];    }    else {        NSLog(@"未从本地获得图片");    }    return image;}

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