今天修改的一个项目bug,在IOS 8 的simulator中运行app,就会卡死在定位的页面。原因是在 iOS 7 以及更早之前的版本,MapView 显示使用者位置不需作到 CLLocationManager,现在都要了。
在 iOS 8 上编译会出现以下 log :
Trying to start MapKit location updates without prompting for location authorization. Must call -[CLLocationManager requestWhenInUseAuthorization] or -[CLLocationManager requestAlwaysAuthorization] first.
经搜索得到解决方法如下:
1、修改info.plist:
新增key
值为NSLocationWhenInUseUsageDescription
或 NSLocationAlwaysUsageDescription
(这里,我将两个都加了进去),value
可以为空,也可以设置YES
,不过我得问题还是不能解决,最终还是找到得了问题所在,就是info.plist
中还需要包含Supported interface orientations
这个Array
字段。然后运行就解决了。
2、修改代码:
在调用方法startUpdatingLocation
的前面加上一句
if([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
[locationManager requestWhenInUseAuthorization];
}
3、博客原文修改方法:
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy=kCLLocationAccuracyBest;
if([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
[locationManager requestWhenInUseAuthorization];
}
[locationManager startUpdatingLocation];
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
if (
([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)] && status != kCLAuthorizationStatusNotDetermined && status != kCLAuthorizationStatusAuthorizedWhenInUse) ||
(![locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)] && status != kCLAuthorizationStatusNotDetermined && status != kCLAuthorizationStatusAuthorized)
) {
NSString *message = @"您的手機目前並未開啟定位服務,如欲開啟定位服務,請至設定->隱私->定位服務,開啟本程式的定位服務功能";
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"無法定位" message:message delegate:nil cancelButtonTitle:@"確定" otherButtonTitles: nil];
[alertView show];
}else {
[locationManager startUpdatingLocation];
}
}
上面那行是 iOS 8 以上,第二行是 iOS 7 以下,因為 kCLAuthorizationStatusAuthorized 在 iOS 8 完全不能使用。
CLAuthorizationStatus status = [CLLocationManager authorizationStatus];
if (status == kCLAuthorizationStatusAuthorizedWhenInUse || status == kCLAuthorizationStatusAuthorized) {
// 開始定位
}else {
// 顯示警告
}