检查是否启用推送或启用位置 ios sdk

Question

我正在使用以下代码来检测这 2 个（推送通知和位置服务）

    [postvars setObject:([CLLocationManager locationServicesEnabled])?@"true":@"false" forKey:@"locationServicesEnabled"];

    BOOL pushEnabled = [[UIApplication sharedApplication] isRegisteredForRemoteNotifications];
    [postvars setObject:(pushEnabled)?@"true":@"false" forKey:@"pushServicesEnabled"];

但问题是，即使我在应用程序中出现提示时点击“不允许”，我也总是对两者都正确。同样在设置应用程序中，我检查了位置设置为从不并且通知子标题显示。这段代码有什么问题？谁能指导我。

Answer 1

检查是否启用了推送通知或位置服务：

推送通知：

从高于 8.0 的 iOS 开始，即使用户选择退出推送，它也会注册设备并提供令牌。

但是，推送发送时不会向用户呈现推送，因此它将返回true。

- (BOOL)isPushNotificationsEnabled {
    if ([[UIApplication sharedApplication] respondsToSelector:@selector(currentUserNotificationSettings)]) {
        UIUserNotificationType types = [[[UIApplication sharedApplication] currentUserNotificationSettings] types];
        return (types & UIUserNotificationTypeAlert);
    }
    else {
        UIRemoteNotificationType types = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
        return (types & UIRemoteNotificationTypeAlert);
    }
}

enabledRemoteNotificationTypes 自 iOS8 起已弃用。

要检查 iOS8 中的远程通知状态，您可以使用：

[[UIApplication sharedApplication] isRegisteredForRemoteNotifications];

在这里查看答案：detect “Allow Notifications” is on/off for iOS8

在此处阅读文档：

https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIApplication_Class/index.html#//apple_ref/occ/instm/UIApplication/currentUserNotificationSettings

另请阅读此处的主题：https://forums.developer.apple.com/thread/16958

定位服务：

需要同时检查locationServicesEnabled 和authorizationStatus 之类的，

if([CLLocationManager locationServicesEnabled] && 
   [CLLocationManager authorizationStatus] != kCLAuthorizationStatusDenied)
{
   //Enabled
}

Answer 2

仅检查[CLLocationManager locationServicesEnabled] 是不够的。

if([CLLocationManager locationServicesEnabled] && 
   [CLLocationManager authorizationStatus] != kCLAuthorizationStatusDenied)
{
    [postvars setObject:@"true" forKey:@"locationServicesEnabled"];

}

通知查看这个很棒的SO answer

BOOL pushEnabled = [[UIApplication sharedApplication] isRegisteredForRemoteNotifications];
[postvars setObject:(pushEnabled)?@"true":@"false" forKey:@"pushServicesEnabled"];

UIRemoteNotificationType types = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
if (types == UIRemoteNotificationTypeNone) 
   {
    [postvars setObject:@"false" forKey:@"pushServicesEnabled"];
}