if([CLLocationManager locationServicesEnabled] && [CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied) {//判断该软件是否开启定位

        JJLog(@"没打开");

        self.isAddress = YES;

        UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"打开定位开关" message:@"请点击设置打开定位服务" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"设置", nil];

        [alertView show];

    }else{

        JJLog(@"打开");

    }

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{

　　if (buttonIndex == 1) {

       　　 NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];

       　　 if ([[UIApplication sharedApplication] canOpenURL:url]) {

           　　 [[UIApplication sharedApplication] openURL:url];

       　　 }

   　　 }

}

ios简单实现如果没有开启定位,提示开启系统软件定位功能