iOS7 CLLocationManager 暂停更新并且不会恢复

Posted 2023-03-05

【中文标题】iOS7 CLLocationManager 暂停更新并且不会恢复

【英文标题】：iOS7 CLLocationManager pauses updates and won't resume

【发布时间】：2014-03-08 20:44:10

【问题描述】：

我有一段代码可以在 ios 模拟中运行并获得连续的位置更新，但是当我在 iPad 上运行它时，它似乎在第三次更新后停止。我试图将 activityType 更改为 other or 并设置可能导致它暂停更新的内容，但这些似乎没有帮助。我也不清楚为什么它在现实生活中而不是在模拟中停止。

我确实尝试在每次更新后停止更新，然后执行 startUpdates，这似乎确实有效，但这让我觉得这是一种不好的行为方式。是否有人对此类问题有其他建议或经验。

#import "ViewController.h"
#import <CoreLocation/CoreLocation.h>

@interface ViewController () <CLLocationManagerDelegate>
@property (nonatomic, strong) CLLocationManager *myLocationManager;
@end

@implementation ViewController

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations

    for (int locIndex = 0; locIndex < locations.count; locIndex++)
    
        CLLocation *newLocation = [locations objectAtIndex:locIndex];
        NSLog(@"Latitude = %f", newLocation.coordinate.latitude);
        NSLog(@"Longitude = %f", newLocation.coordinate.longitude);
    
    CLLocationDistance  distance = 0;
    NSTimeInterval timeout = 1;

    [manager allowDeferredLocationUpdatesUntilTraveled:distance timeout:timeout];




- (void)locationManager:(CLLocationManager *)manager
    didUpdateToLocation:(CLLocation *)newLocation
           fromLocation:(CLLocation *)oldLocation
    CLLocationDistance  distance = 0;
    NSTimeInterval timeout = 1;

    [manager allowDeferredLocationUpdatesUntilTraveled:distance timeout:timeout];


    /* We received the new location */

    NSLog(@"Latitude = %f", newLocation.coordinate.latitude);
    NSLog(@"Longitude = %f", newLocation.coordinate.longitude);
    //[self.myLocationManager stopUpdatingLocation];
    //[self.myLocationManager startUpdatingLocation];



- (void)locationManager:(CLLocationManager *)manager
       didFailWithError:(NSError *)error

    /* Failed to receive user's location */
    NSLog(@"******************************************************");
    NSLog(@"************** FAILED TO RECEIVE LOCATION ************");
    NSLog(@"******************************************************");


- (void)viewDidLoad 
    [super viewDidLoad];

    if ([CLLocationManager locationServicesEnabled])
        self.myLocationManager = [[CLLocationManager alloc] init];
        self.myLocationManager.delegate = self;
        //self.myLocationManager.pausesLocationUpdatesAutomatically = NO;
        //self.myLocationManager.activityType = CLActivityTypeOther;

        [self.myLocationManager startUpdatingLocation];

        //self.myPeripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self queue:nil options:nil];



     else 
        /* Location services are not enabled.
         Take appropriate action: for instance, prompt the
         user to enable the location services */
        NSLog(@"Location services are not enabled");
    

【问题讨论】：

iPad 是否有 SIM 卡，即是否有移动数据？

【参考方案1】：

当用户忘记 GPS 处于活动状态时使用暂停。为防止 GPS 耗尽电池电量，在重新启动应用程序之前，GPS 会停止并重新打开。

您应该接听暂停呼叫并询问用户位置更新是否应该继续。