iOS 将图片保存到本地

//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;

}