iOS中判断该应用定位开启状态并跳转设置

#pragma mark---是否打开了定位---
BOOL isOpen=[CLLocationManager locationServicesEnabled];
if (isOpen==YES) {
NSLog(@"用户打开了位置服务功能");
}else{
//1、跳出弹出框 提示用户打开步骤

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"温馨提示" message:@"请在设置中打开定位功能" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *queding=[UIAlertAction actionWithTitle:@"确定" style:0 handler:^(UIAlertAction * _Nonnull action) {

}];
UIAlertAction *quxiao=[UIAlertAction actionWithTitle:@"取消" style:0 handler:^(UIAlertAction * _Nonnull action) {

}];
[alertController addAction:queding];
[alertController addAction:quxiao];
[self presentViewController:alertController animated:YES completion:nil];
}