iOS 图片保存手机相册

UIImageWriteToSavedPhotosAlbum(app.erweiImg, self, @selector(p_w_picpath:didFinishSavingWithError:contextInfo:), nil);

- (void)p_w_picpath:(UIImage *)p_w_picpath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo

{

    UIAlertView *alert;

    if (error == nil)

    {

        alert = [[[UIAlertView alloc]initWithTitle:@"温馨提示" message:@"保存成功" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil]autorelease];

                [alert show];

                return;

    }

    else

    {

        alert = [[[UIAlertView alloc]initWithTitle:@"保存失败" message:@"请打开 设置-隐私-照片 来进行设置" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil]autorelease];

                [alert show];

                return;

    }

}