将图片保存到本地

---

将图片保存到本地

传入图片 以及图片的名字

- (void)writeImage:(UIImage *)imageToWrite toFile:(NSString *)fileName;
{
    if (imageToWrite == nil)
    {
        return;
    }
//转成NSData类型
    NSData *dataForPNGFile = UIImagePNGRepresentation(imageToWrite);
//获取路径
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSLog(@"documentsDirectory ,%@",documentsDirectory);
    NSError *error = nil;
    //写入 并拼接路径
    if (![dataForPNGFile writeToFile:[documentsDirectory stringByAppendingPathComponent:fileName] options:NSAtomicWrite error:&error])
    {
        return;
    }
}

使用：

 UIImage *inputImage = [UIImage imageNamed:@"Lambeau.jpg"];
 [self writeImage:inputImage toFile:@"Lambeau.png"];