线程 1：我的 CLLocationManager() 的 EXC_BAD_ACCESS (code=2, address=0x7ffee84eaf60)答案

【问题标题】：Thread 1: EXC_BAD_ACCESS (code=2, address=0x7ffee84eaf60) for my CLLocationManager()线程 1：我的 CLLocationManager() 的 EXC_BAD_ACCESS (code=2, address=0x7ffee84eaf60)
【发布时间】：2020-12-06 01:47:10
【问题描述】：

我不知道为什么会这样或如何解决它。错误：线程 1：EXC_BAD_ACCESS (code=2, address=0x7ffee84eaf60) 发生在我的行上：

let locationManager = CLLocationManager()

我在 viewDidLoad() 上面的类中声明了它。我已经运行这个模拟器很多次没有这个问题，现在它随机弹出。我检查以确保它不是我添加的最新代码，在没有所述代码的情况下再次运行它，并且错误仍然存在。以防万一您想到这一点，并不是我的默认位置设置为无，我之前遇到过该错误并已修复。以下是使用 locationManager 的代码的所有部分：

let locationManager = CLLocationManager()

然后：

override func viewDidLoad() {
    super.viewDidLoad()
    
    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()
    
    mapView.delegate = self
    mapView.showsUserLocation = true
    
    tapToAddJumpSpotLabel.isHidden = true
}

然后：

@IBAction func allowLocationButtonPressed(_ sender: UIBarButtonItem) {

    switch CLLocationManager.authorizationStatus() {

    // Case when authorization not determined.
    case .notDetermined:
        locationManager.requestWhenInUseAuthorization()

    // Case when authorization granted.
    case .authorizedAlways, .authorizedWhenInUse:
        let alertController = UIAlertController(title: "Location Access Granted", message: "We already have access to your location.  If you want to change this, go to your settings app, and change our location access.", preferredStyle: .alert)

        let okayAction = UIAlertAction(title: "Okay", style: .cancel, handler: nil)

        alertController.addAction(okayAction)

        self.present(alertController, animated: true, completion: nil)

    // Case when authorization denied or restricted.
    case .restricted, .denied:
        let alertController = UIAlertController(title: "Location Access Disabled", message: "We need access to your location in order to provide you with cliff jumping spots.", preferredStyle: .alert)

        let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)

        let openAction = UIAlertAction(title: "Open Settings", style: .default) { (action) in
            if let url = URL(string: UIApplication.openSettingsURLString) {
                UIApplication.shared.open(url, options: [:], completionHandler: nil)
            }
        }
        alertController.addAction(cancelAction)
        alertController.addAction(openAction)

        self.present(alertController, animated: true, completion: nil)

    // Default (Apple has possible future cases to be added to CLAuthorizationStatus).
    @unknown default:
        return
    }
}

终于：

//MARK: - CLLocationManagerDelegate Methods

extension ViewController: CLLocationManagerDelegate {

func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
    if let error = error as? CLError, error.code == .denied {
        locationManager.stopUpdatingLocation()
        print(error)
        return
    }
    
}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let lastLocation = locations.last!
    mapView.centerCoordinate.latitude = lastLocation.coordinate.latitude
    mapView.centerCoordinate.longitude = lastLocation.coordinate.longitude
}

}

我不知道是什么原因造成的，因此感谢您的帮助:)

【问题讨论】：

你能显示崩溃的线程...以防它有任何提示吗？（调试窗口中的“bt”。）
@PhillipMills 不确定您所说的“bt”是什么意思，但我的调试窗口左侧有这个：self Jumper.ViewController 0x0000618000378480 UIKit.UIViewController UIViewController mapView MKMapView？无 tapToAddJumpSpotLabel UILabel? nil 无 locationManager CLLocationManager 0x0000000000000000 ObjectiveC.NSObject NSObject jumpSpotCreatorController Jumper.JumpSpotCreatorController 0x0000000000000000 userIsAllowedToAddAnnotation Bool false AND 在右边只是（11db）
我的意思是，当它崩溃时，在 (lldb) 提示符下键入“bt”。
@PhillipMills 好的，它给了我很多行，这是开始：线程 #1，队列 = 'com.apple.main-thread'，停止原因 = EXC_BAD_ACCESS（代码 = 2，地址=0x7ffee244fb70) 帧#0: 0x000000010d11ab4a libclang_rt.asan_iossim_dynamic.dylib__sanitizer_mz_malloc + 58 frame #1: 0x00007fff51b732a3 libsystem_malloc.dylibmalloc_zone_malloc + 104 帧#2: 0x00007fff23de0d50 CoreFoundation__CFStringChangeSizeMultiple + 848 frame #3: 0x00007fff23dda33e CoreFoundation+ 654 行不知道有多大帮助>
代码中是否有提及某些内容的行？那些说在处理字符串时内存分配出了问题……这不是很具体。

标签： swift xcode core-location cllocationmanager exc-bad-access

【解决方案1】：

好吧，经过进一步挖掘，我觉得自己很愚蠢。只是一个类在另一个类中的旧对象初始化，反之亦然，导致无限循环。好在其中一个很旧，我只是忘了删除它，所以你去吧！

【讨论】：