问题
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
@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
回答1:
I didn't solve the bug issue, But i did realize how easy it was to get the re auto locate button to work. The code that I used to initially get the auto location just needs to be copied and pasted into the button action brackets and will rerun the code when tapped.
来源：https://stackoverflow.com/questions/33088305/xcode-7-error-editor-placeholder-in-source-file