如何解决我们可以检查允许应用程序请求跟踪切换是否打开
在 iOS 14 中,我们有一项新功能可以跟踪 IDFA。这是默认设置,仅在 iOS 14 中可用。(设置 > 隐私 > 跟踪 > 允许应用请求跟踪)。我想使用objective-C检查允许应用程序请求跟踪切换是打开还是关闭。我该怎么做?
解决方法
请注意,我们只能使用 ATTrackingManager
API 访问我们自己的应用的授权状态。我们无法使用任何公共 API 读取全局设置。
您可以通过检查 [ATTrackingManager trackingAuthorizationStatus]
的值来检查应用的状态:
ATTrackingManagerAuthorizationStatus status = [ATTrackingManager trackingAuthorizationStatus];
switch (status) {
case ATTrackingManagerAuthorizationStatusNotDetermined:
// The user has not yet received an authorization request to authorize access to app-related data that can be used for tracking the user or the device.
break;
case ATTrackingManagerAuthorizationStatusAuthorized:
// The user authorizes access to app-related data that can be used for tracking the user or the device.
break;
case ATTrackingManagerAuthorizationStatusDenied:
// The user denies authorization to access app-related data that can be used for tracking the user or the device.
break;
case ATTrackingManagerAuthorizationStatusRestricted:
// The authorization to access app-related data that can be used for tracking the user or the device is restricted.
break;
}
您也可以在向用户请求授权后读取相同的状态:
[ATTrackingManager requestTrackingAuthorizationWithCompletionHandler:^(ATTrackingManagerAuthorizationStatus status) {
// Check for status after request
}];
另请注意,我们只能请求一次授权。不建议一直向用户索要请求。
但是,如果您的应用确实需要这样做,那么解决方案是将用户导航到“设置”,指示他们为应用打开授权:
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[self checkTrackingAuthorization:ATTrackingManager.trackingAuthorizationStatus];
}
- (void)checkTrackingAuthorization:(ATTrackingManagerAuthorizationStatus) status {
switch (status) {
case ATTrackingManagerAuthorizationStatusAuthorized:
// The user authorizes access to app-related data that can be used for tracking the user or the device.
break;
case ATTrackingManagerAuthorizationStatusNotDetermined:
// The user has not yet received an authorization request to authorize access to app-related data that can be used for tracking the user or the device.
[self requestTrackingAccess];
break;
case ATTrackingManagerAuthorizationStatusDenied:
// The user denies authorization to access app-related data that can be used for tracking the user or the device.
case ATTrackingManagerAuthorizationStatusRestricted:
// The authorization to access app-related data that can be used for tracking the user or the device is restricted.
[self displayTrackingAccessAlert];
break;
}
}
- (void)requestTrackingAccess {
[ATTrackingManager requestTrackingAuthorizationWithCompletionHandler:^(ATTrackingManagerAuthorizationStatus status) {
[self checkTrackingAuthorization:status];
}];
}
- (void)displayTrackingAccessAlert {
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Tracking access is required" message:@"Please turn on access to tracking on the settings" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *settingsAction = [UIAlertAction actionWithTitle:@"Settings" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
// Open the Settings app
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString] options:@{} completionHandler:nil];
}];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:nil];
[alert addAction:settingsAction];
[alert addAction:cancelAction];
[alert setPreferredAction:settingsAction];
UIWindow *alertWindow = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
alertWindow.rootViewController = [[UIViewController alloc] init];
alertWindow.windowLevel = UIWindowLevelAlert + 1;
[alertWindow makeKeyAndVisible];
[alertWindow.rootViewController presentViewController:alert animated:YES completion:nil];
}
,
您需要跟踪您的应用是否已请求跟踪权限(例如,将 bool
存储在 NSUserDefaults
中。
然后您可以检查[ATTrackingManager trackingAuthorizationStatus]
。如果状态为 ATTrackingManagerAuthorizationStatusDenied
但您从未请求过跟踪权限(因此用户不能明确拒绝对您的应用的跟踪权限),您知道“允许应用请求跟踪”开关是关闭。
一旦您请求许可,您就无法再确定开关是否已关闭,或者用户是否刚刚明确拒绝了对您的应用的跟踪权限。无论哪种方式,您都无能为力,并且不断纠缠用户打开跟踪功能不会让他们喜欢您的应用。
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