APP 系统权限的查询

引言:

APP开发避免不开系统权限的问题，如何在APP以更加友好的方式向用户展示系统权限，似乎也是开发过程中值得深思的一件事；

那如何提高APP获取iOS系统权限的通过率呢？有以下几种方式:

在用户打开APP时就向用户请求权限；
告知用户授权权限后能够获得好处之后，再向用户请求权限；
在绝对必要的情况下才向用户请求权限，例如：用户访问照片库时请求访问系统相册权限；
在展示系统权限的对话框前，先向用户显示自定义的对话框，若用户选择不允许，默认无操作，若用户选择允许，再展示系统对话框。

上述情况在开发过程中是经常遇到的，不同方式的选择会影响最后用户交互体验。这一点感悟正是源于上一周工作遇到的问题：适配iOS10，如何获取应用联网权限用以管理系统对话框的显示管理。当我把这个问题解决后，感觉有必要将常用的iOS系统权限做一个总结，以便后用。

# 一. 权限分类

推送权限
通讯录权限
联网权限
相机、麦克风权限
相册权限
定位权限
日历、备忘录权限

# 二. 推送权限

# 1. 检查是否有推送权限：

UIUserNotificationSettings *settings = [[UIApplication sharedApplication] currentUserNotificationSettings];
switch (settings.types) {
  case UIUserNotificationTypeNone:
      NSLog(@"None");
      break;
  case UIUserNotificationTypeAlert:
      NSLog(@"Alert Notification");
      break;
  case UIUserNotificationTypeBadge:
      NSLog(@"Badge Notification");
      break;
  case UIUserNotificationTypeSound:
      NSLog(@"sound Notification'");
      break;

  default:
      break;
}

# 2. 获取推送权限：

    if (@available(iOS 10.0, *)) {
        [[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions: UNAuthorizationOptionBadge|UNAuthorizationOptionSound |UNAuthorizationOptionAlert completionHandler:^(BOOL granted, NSError * _Nullable error) {
            NSLog(@"授权 %@",granted == YES ? @"成功" : @"失败");
        }];
    } else {
    
        UIUserNotificationSettings *seting = [UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound) categories:nil];
        
        [[UIApplication sharedApplication] registerUserNotificationSettings:seting];
    }

# 三. 通讯录权限

# 1. 检查是否有通讯录权限:

导入头文件 #import "AddressBook.h"

    ABAuthorizationStatus ABstatus = ABAddressBookGetAuthorizationStatus();
switch (ABstatus) {
  case kABAuthorizationStatusAuthorized:
      NSLog(@"Authorized");
      break;
  case kABAuthorizationStatusDenied:
      NSLog(@"Denied'");
      break;
  case kABAuthorizationStatusNotDetermined:
      NSLog(@"not Determined");
      break;
  case kABAuthorizationStatusRestricted:
      NSLog(@"Restricted");
      break;
  default:
      break;
}

# 2. 获取通讯录权限:

ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, NULL);
ABAddressBookRequestAccessWithCompletion(addressBook, ^(bool granted, CFErrorRef error) {
  if (granted) {
      NSLog(@"Authorized");
      CFRelease(addressBook);
  }else{
      NSLog(@"Denied or Restricted");
  }
});

# 三. 联网权限

# 1. 检测应用中是否有联网权限

引入头文件 #import "CoreTelephony.h"

CTCellularData *cellularData = [[CTCellularData alloc]init];
cellularData.cellularDataRestrictionDidUpdateNotifier =  ^(CTCellularDataRestrictedState state){
  //获取联网状态
  switch (state) {
      case kCTCellularDataRestricted:
          NSLog(@"Restricrted");
          break;
      case kCTCellularDataNotRestricted:
          NSLog(@"Not Restricted");
          break;
      case kCTCellularDataRestrictedStateUnknown:
          NSLog(@"Unknown");
          break;
      default:
          break;
  };
};

# 四. 相机和麦克风权限

导入头文件@import AVFoundation;

# 1. 检查是否有相机或麦克风权限:

AVAuthorizationStatus AVstatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];//相机权限
AVAuthorizationStatus AVstatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio];//麦克风权限

switch (AVstatus) {
  case AVAuthorizationStatusAuthorized:
      NSLog(@"Authorized");
      break;
  case AVAuthorizationStatusDenied:
      NSLog(@"Denied");
      break;
  case AVAuthorizationStatusNotDetermined:
      NSLog(@"not Determined");
      break;
  case AVAuthorizationStatusRestricted:
      NSLog(@"Restricted");
      break;
  default:
      break;
}

# 2. 获取相机或麦克风权限:

[AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {//相机权限
  if (granted) {
      NSLog(@"Authorized");
  }else{
      NSLog(@"Denied or Restricted");
  }
}];

[AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {//麦克风权限
  if (granted) {
      NSLog(@"Authorized");
  }else{
      NSLog(@"Denied or Restricted");
  }
}];

# 五. 相册权限

# 1. 检查是否有相册权限

iOS 9.0之前

导入头文件@import AssetsLibrary;

ALAuthorizationStatus status = [ALAssetsLibrary authorizationStatus];
switch (status) {
  case ALAuthorizationStatusAuthorized:
      NSLog(@"Authorized");
      break;
  case ALAuthorizationStatusDenied:
      NSLog(@"Denied");
      break;
  case ALAuthorizationStatusNotDetermined:
      NSLog(@"not Determined");
      break;
  case ALAuthorizationStatusRestricted:
      NSLog(@"Restricted");
      break;

  default:
      break;
}

iOS 8.0之后

导入头文件@import Photos;

PHAuthorizationStatus photoAuthorStatus = [PHPhotoLibrary authorizationStatus];
switch (photoAuthorStatus) {
  case PHAuthorizationStatusAuthorized:
      NSLog(@"Authorized");
      break;
  case PHAuthorizationStatusDenied:
      NSLog(@"Denied");
      break;
  case PHAuthorizationStatusNotDetermined:
      NSLog(@"not Determined");
      break;
  case PHAuthorizationStatusRestricted:
      NSLog(@"Restricted");
      break;
  default:
      break;
}

# 2. 获取相册权限

[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
  if (status == PHAuthorizationStatusAuthorized) {
      NSLog(@"Authorized");
  }else{
      NSLog(@"Denied or Restricted");
  }
}];

# 六. 定位权限

导入头文件@import CoreLocation;

由于iOS8.0之后定位方法的改变，需要在info.plist中进行配置；

# 1. 检查是否有定位权限:

BOOL isLocation = [CLLocationManager locationServicesEnabled];
if (!isLocation) {
  NSLog(@"not turn on the location");
}
CLAuthorizationStatus CLstatus = [CLLocationManager authorizationStatus];
switch (CLstatus) {
  case kCLAuthorizationStatusAuthorizedAlways:
      NSLog(@"Always Authorized");
      break;
  case kCLAuthorizationStatusAuthorizedWhenInUse:
      NSLog(@"AuthorizedWhenInUse");
      break;
  case kCLAuthorizationStatusDenied:
      NSLog(@"Denied");
      break;
  case kCLAuthorizationStatusNotDetermined:
      NSLog(@"not Determined");
      break;
  case kCLAuthorizationStatusRestricted:
      NSLog(@"Restricted");
      break;
  default:
      break;
}

# 2. 获取定位权限:

CLLocationManager *manager = [[CLLocationManager alloc] init];
// 一直获取定位信息
[manager requestAlwaysAuthorization];
// 使用的时候获取定位信息
[manager requestWhenInUseAuthorization];
* 在代理方法中查看权限是否改变
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{
switch (status) {
  case kCLAuthorizationStatusAuthorizedAlways:
      NSLog(@"Always Authorized");
      break;
  case kCLAuthorizationStatusAuthorizedWhenInUse:
      NSLog(@"AuthorizedWhenInUse");
      break;
  case kCLAuthorizationStatusDenied:
      NSLog(@"Denied");
      break;
  case kCLAuthorizationStatusNotDetermined:
      NSLog(@"not Determined");
      break;
  case kCLAuthorizationStatusRestricted:
      NSLog(@"Restricted");
      break;
  default:
      break;
  }
}

# 七. 日历、备忘录权限

# 1. 检查是否有日历或者备忘录权限:

typedef NS_ENUM(NSUInteger, EKEntityType) {
  EKEntityTypeEvent,//日历
  EKEntityTypeReminder //备忘
};

EKAuthorizationStatus EKstatus = [EKEventStore  authorizationStatusForEntityType:EKEntityTypeEvent];
switch (EKstatus) {
  case EKAuthorizationStatusAuthorized:
      NSLog(@"Authorized");
      break;
  case EKAuthorizationStatusDenied:
      NSLog(@"Denied'");
      break;
  case EKAuthorizationStatusNotDetermined:
      NSLog(@"not Determined");
      break;
  case EKAuthorizationStatusRestricted:
      NSLog(@"Restricted");
      break;
  default:
      break;
}

# 2. 获取日历或备忘录权限:

EKEventStore *store = [[EKEventStore alloc]init];
[store requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError * _Nullable error) {
  if (granted) {
      NSLog(@"Authorized");
  }else{
      NSLog(@"Denied or Restricted");
  }
}];

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