UIImage NSData转换

最新推荐文章于 2019-03-14 16:46:11 发布

李昊的Blog

最新推荐文章于 2019-03-14 16:46:11 发布

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分类专栏： Objective-C 文章标签： UIImage NSData

本文链接：https://blog.youkuaiyun.com/skyfromchina/article/details/18084283

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-(void)writeButtonAction:(id)sender{
    NSString * path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString * newPath = [NSString stringWithFormat:@"%@/data",path];
    UIImage *image = [UIImage imageNamed:@"111.png"];
    NSData * data = UIImagePNGRepresentation(image); //如果是PNG的图片用这个，别的就把PNG换成拓展名
    [data writeToFile:newPath atomically:YES];
}

-(void)readButtonAction:(id)sender{
    NSString * path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString * newPath = [NSString stringWithFormat:@"%@/data",path];
    NSData * data = [NSData dataWithContentsOfFile:newPath];
    //将data转换成字符串
    UIImage * image = [UIImage imageWithData:data];
    [_imageView setImage:image];
}