小编rea*_* 19的帖子

我正在将应用程序从iOS迁移到OSX,在OSX中是否有类似于UIActivityViewController的东西.对于像Facebook,Twitter,邮件,消息共享这样的东西,我需要做类似的事情;

NSArray *activityItems = [NSArray arrayWithObjects:shareString, shareImage, shareUrl, nil];


UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];

activityViewController.excludedActivityTypes = @[UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll];


activityViewController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentViewController:activityViewController animated:YES completion:nil];

如何在OSX中实现这一目标？

我在应用内收到错误

" Assertion failure in -[AVPlayerPeriodicCaller initWithPlayer:interval:queue:block:], /SourceCache/EmbeddedAVFoundation/EmbeddedAVFoundation-461.12/Fig/AVPlayer.m:3993

 Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: CMTIME_COMPARE_INLINE(interval, >, kCMTimeZero)'

任何想法为什么会发生这种情况？

我仅限于使用AvPlayer，因为我需要流式传输大文件。AVaudioplayer无法选择。因此，我还实现了一个洗涤器滑块。我对AVplayer的实现如下：

-(void)playAudioForFile:(NSString *)fileName{

    [self.suraPlayer removeTimeObserver:playbackObserver];
    [self.suraPlayer removeTimeObserver:mTimeObserver];
    self.suraPlayer = nil;

NSURL* url = [self getURLStringForFileName:fileName];

AVPlayer *player = [[AVPlayer alloc]initWithURL:url];

self.suraPlayer = player;

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(playerItemDidReachEnd:)
                                             name:AVPlayerItemDidPlayToEndTimeNotification
                                           object:[suraPlayer currentItem]];


[self.suraPlayer play];



[self.suraPlayer addObserver:self forKeyPath:@"status" options:0 context:nil];

[self initScrubberTimer];

[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(updateProgress) userInfo:nil repeats:YES];

//[self metadataForAsset:self.suraPlayer.currentItem.asset];

}

-(void)updateProgress {



   // NSLog(@"self.mScrubber.value %f", self.mScrubber.value);

//这是调试器有时绊脚石的路线

float …

我有一个有效的Google地图网址,如果您在浏览器中运行,则会显示地图图片.但是,当我把它放在我的Swift代码中并尝试从String创建NSURL时,它返回nil

let urlString = "https://maps.googleapis.com/maps/api/staticmap?maptype=hybrid&center=37.33233141,-122.0312186&path=color:0xff0000|weight:10|37.33233141,-122.0312186|21.422570,%2039.826190&markers=color:blue%7Clabel:S%7C37.33233141,-122.0312186&markers=color:blue%7Clabel:S%7C21.422570,39.826190&zoom=1&size=1080x1920"
let url = NSURL(string: urlString)

目前,这个回报为零,我不知道为什么.难道我做错了什么？

我想看一些关于如何使用NSJSONSerialization类在URL中获取和POST数据的具体示例/教程.

我知道如何实际获取数据,这是POST在某种程度上令人困惑.任何有用的指针将非常感谢..