Question

我试图使用下一代码保存我应用的屏幕截图：

UIView* view = [[[[UIApplication sharedApplication] keyWindow] subviews] lastObject];
UIGraphicsBeginImageContext(view.bounds.size);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData * data = UIImagePNGRepresentation(image);

NSURL* documentsDirectory = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
NSString* filename = [NSString stringWithUTF8String: @"screenshot.png"];
NSString* path =[NSString stringWithFormat:@"%@/%@",[documentsDirectory path], filename];

BOOL saved = [[NSFileManager defaultManager] createFileAtPath:path contents:data attributes:nil];
NSLog(saved ? @"Saved" : @"Not saved");

它会记录Saved，但图片不会显示在照片应用中。

documentsDirectory：/var/mobile/Containers/Data/Application/003D7989-D88E-48FF-A3C5-86A340C6F077/Documents

我做错了什么？谢谢你的回复。

Answer 1

尝试使用此代码在Photo app中保存图像

NSData * data = UIImagePNGRepresentation(image);
UIImageWriteToSavedPhotosAlbum(compressedPNGImage,
                               self,
                               @selector(thisImage:hasBeenSavedInPhotoAlbumWithError:usingContextInfo:),
                               NULL);

然后你应该实现上面的选择器

- (void)thisImage:(UIImage *)image hasBeenSavedInPhotoAlbumWithError:(NSError *)error usingContextInfo:(void*)ctxInfo
{
    if (error)
    {
        // not saved
    }
    else
    {
        // saved
    }
}

最后，请务必在信息目标设置中添加“隐私 - 照片库使用说明”键

屏幕截图不会出现在照片应用（iOS obj-c）

1 个答案: