objective-c - 为什么 requestWhenInUseAuthorization 不提示用户访问该位置？

Question

在我的 viewDidLoad 方法中，我有

locationManager = [[CLLocationManager alloc]init]; // initializing locationManager
locationManager.delegate = self; // we set the delegate of locationManager to self.
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];


if([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) {
    [locationManager requestWhenInUseAuthorization];
}

并且调用了请求，但是没有提示用户？为什么？

Answer 1

您可能需要更新您的 plist 文件。这是 tutorial how to do it ，又快又脏:

您需要做的是将以下键之一添加到您的 Info.plist 文件中:

NSLocationWhenInUseUsageDescription

NSLocationAlwaysUsageDescription

您还需要为相应的定位方法请求授权，WhenInUse 或Background。使用以下调用之一:

[self.locationManager requestWhenInUseAuthorization]
[self.locationManager requestAlwaysAuthorization]

还有一篇我觉得很有帮助的帖子:

Location Services not working in iOS 8

此答案详情how to update your plist file :

Add one of the following lines to your info.plist

<key>NSLocationWhenInUseUsageDescription</key>
<string>The spirit of stack overflow is coders helping coders</string>

<key>NSLocationAlwaysUsageDescription</key>
<string>I have learned more on stack overflow than anything else</string>

您可能需要自定义和拼写检查 info.plist 文件中 shipping the code 之前的字典条目的字符串。 .