xcode7:error:源文件中的编辑器占位符-xcode7:error:editorplaceholderinsourcefile

I am trying to create a button on apple maps that will relocate the user if he or she navigates elsewhere. I found some old solutions to this problem for like ios 7 or 8 which no longer worked in ios 9. This is what I tried

我正在尝试在苹果地图上创建一个按钮，如果用户在其他地方导航，它将重新定位用户。我为这个问题找到了一些旧的解决方案，比如ios 7或8，它们在ios 9中已经失效了。这就是我所尝试的

@IBAction func locateMe(sender: AnyObject) {

    self.mapView.setUserTrackingMode(MKUserTrackingMode, animated: true)

}

there are no errors before I try to run it but when I do it says: editor placeholder in source file

在我尝试运行它之前没有错误，但是当我这么做时，它说:在源文件中编辑占位符。

1 个解决方案