iOS系統(tǒng)授權(quán)開發(fā)
iOS系統(tǒng)開發(fā)中，最常用的系統(tǒng)授權(quán)辙纬，莫過于系統(tǒng)通知,用戶相冊,位置服務(wù)了疫剃，這篇文章將簡單講解這三項功能的開發(fā)巍扛，并附帶我寫的一個開源項目，統(tǒng)一管理系統(tǒng)授權(quán)尾组。
注：本文和項目基于iOS 8.0及以上系統(tǒng)框架臼予，低版本框架接口略有不同侣颂。
系統(tǒng)通知授權(quán)
系統(tǒng)通知方法在UIApplication類方法中坟乾，其中使用isRegisteredForRemoteNotifications獲取本地推送授權(quán)狀態(tài)。
+ (UIUserNotificationType)notificationType
{
UIApplication* application = [UIApplication sharedApplication];
return [application currentUserNotificationSettings].types;
}
這里授權(quán)狀態(tài)的枚舉類型有
-
UIUserNotificationTypeNone無授權(quán) -
UIUserNotificationTypeBadge角標(biāo) -
UIUserNotificationTypeSound聲音 -
UIUserNotificationTypeAlert通知
原枚舉如下
typedef NS_OPTIONS(NSUInteger, UIUserNotificationType) {
UIUserNotificationTypeNone = 0, // the application may not present any UI upon a notification being received
UIUserNotificationTypeBadge = 1 << 0, // the application may badge its icon upon a notification being received
UIUserNotificationTypeSound = 1 << 1, // the application may play a sound upon a notification being received
UIUserNotificationTypeAlert = 1 << 2, // the application may display an alert upon a notification being received
} NS_ENUM_AVAILABLE_IOS(8_0) __TVOS_PROHIBITED;
授權(quán)方法
UIUserNotificationType type = UIUserNotificationTypeBadge | UIUserNotificationTypeAlert | UIUserNotificationTypeSound;
UIUserNotificationSettings *setting = [UIUserNotificationSettings settingsForTypes:type categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:setting];
注意蝶防，每一項授權(quán)甚侣，一旦用戶拒絕，必須前往設(shè)置的相關(guān)APP頁面開啟间学。APP內(nèi)跳設(shè)置的方法是
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
注冊本地通知也是有回調(diào)的殷费，實現(xiàn)UIApplicationDelegate的didRegisterUserNotificationSettings方法。
- (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings
{
}
相應(yīng)的也有失敗的回調(diào)低葫。
系統(tǒng)相冊授權(quán)
8.0系統(tǒng)版本以后详羡，框架中加入了Photos.framework框架，當(dāng)然是用UIImagePickerController同樣會提醒用戶授權(quán)使用相冊或相機嘿悬，這里介紹一下Photos框架的授權(quán)实柠。
相冊權(quán)限狀態(tài)
+ (PHAuthorizationStatus)photoAccesStatus
{
return [PHPhotoLibrary authorizationStatus];
}
typedef NS_ENUM(NSInteger, PHAuthorizationStatus) {
PHAuthorizationStatusNotDetermined = 0, // User has not yet made a choice with regards to this application
PHAuthorizationStatusRestricted, // This application is not authorized to access photo data.
// The user cannot change this application’s status, possibly due to active restrictions
// such as parental controls being in place.
PHAuthorizationStatusDenied, // User has explicitly denied this application access to photos data.
PHAuthorizationStatusAuthorized // User has authorized this application to access photos data.
} NS_AVAILABLE_IOS(8_0);
這里授權(quán)狀態(tài)有四個狀態(tài)
-
PHAuthorizationStatusNotDetermined未授權(quán) -
PHAuthorizationStatusRestricted授權(quán)中 -
PHAuthorizationStatusDenied拒絕 -
PHAuthorizationStatusAuthorized已授權(quán)
授權(quán)Block方法
[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
}];
位置服務(wù)授權(quán)
位置服務(wù)授權(quán)稍微復(fù)雜一點點，8.0以后善涨，進行位置服務(wù)授權(quán)要注意一點是窒盐，需要在工程的Info.plist文件中加入NSLocationAlwaysUsageDescription字段。字段中是開發(fā)者展示給用戶的位置服務(wù)的使用場景介紹钢拧，或者是請求授權(quán)的描述蟹漓。如果不添加這個字段，授權(quán)接口無任何反應(yīng)源内。
狀態(tài)接口
+ (CLAuthorizationStatus)positionAuthorizationStatus
{
return [CLLocationManager authorizationStatus];
}
授權(quán)方法
+ (void)authorizedPosition:(CLLocationManager *)manager
{
[manager requestAlwaysAuthorization];
}
注意這里傳入的manager一定要是個property,如果是一個局部變量葡粒，大括號結(jié)束，釋放掉了，授權(quán)就會消失嗽交，就會出現(xiàn)授權(quán)框一閃而過的現(xiàn)象卿嘲。
開源項目 DeviceAccessViewController
PermissionScope 項目
PermissionScope(Github)是一個超級屌，并且好用的開源控件轮纫，用來向用戶申請系統(tǒng)授權(quán)腔寡。如果你有使用cocospod管理工具，這樣加入use_frameworks!,因為PermissionScope是swift寫的掌唾，需要編譯成Framework才可以給ObjC用放前。
use_frameworks!
pod 'PermissionScope'
具體用法
PermissionScope* scope = [[PermissionScope alloc] initWithBackgroundTapCancels:YES];
//[scope addPermission:[[CameraPermission alloc] init] message:@"請求使用您的相機"];
//[scope addPermission:[[BluetoothPermission alloc] init] message:@"請求使用您的藍牙"];
//[scope addPermission:[[ContactsPermission alloc] init] message:@"請求使用您的通訊錄"];
//[scope addPermission:[[EventsPermission alloc] init] message:@"請求使用您的日歷"];
[scope addPermission:[[LocationAlwaysPermission alloc] init] message:@"請求使用您的位置"];
[scope addPermission:[[MicrophonePermission alloc] init] message:@"請求使用您的麥克風(fēng)"];
[scope addPermission:[[NotificationsPermission alloc] initWithNotificationCategories:nil] message:@"請求使用通知服務(wù)"];
[scope show:^(BOOL s, NSArray<PermissionResult *> * _Nonnull results) {
} cancelled:^(NSArray<PermissionResult *> * _Nonnull canceled) {
}];
這個例子很明了吧，但要注意幾點
- 最少要添加一個Permission
- 最多添加3個Permission
- 8.0以后糯彬，進行位置服務(wù)授權(quán)凭语，需要在工程的
Info.plist文件中加入NSLocationAlwaysUsageDescription字段。
