1、写在前面

  • 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:
    • 1.在用户打开APP时就向用户请求权限;
    • 2.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;
    • 3.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;
    • 4.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。

2、权限分类

  • 2.1 联网权限

    • 引入头文件 @import CoreTelephony;
    • 应用启动后,检测应用中是否有联网权限
    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;
    };
    };
    • 查询应用是否有联网功能
    CTCellularData *cellularData = [[CTCellularData alloc]init];
    CTCellularDataRestrictedState state = cellularData.restrictedState;
    switch (state) {
    case kCTCellularDataRestricted:
    NSLog(@"Restricrted");
    break;
    case kCTCellularDataNotRestricted:
    NSLog(@"Not Restricted");
    break;
    case kCTCellularDataRestrictedStateUnknown:
    NSLog(@"Unknown");
    break;
    default:
    break;
    }
  • 2.2 相册权限

    • --iOS 9.0之前
    • 导入头文件 #import <AssetsLibrary/AssetsLibrary.h>
    • 检查是否有相册权限
     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;
    }
  • 相册权限--iOS 8.0之后

    • 导入头文件 #import <Photos/Photos.h>
    • 检查是否有相册权限
    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;
    } [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
    if (status == PHAuthorizationStatusAuthorized) {
    NSLog(@"Authorized");
    }
    else {
    NSLog(@"Denied or Restricted");
    }
    }];
  • 2.3 相机和麦克风权限

    • 导入头文件#import <AVFoundation/AVFoundation.h>
    • 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;
    }
    • 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");
    }
    }];
  • 2.4 定位权限

    • 导入头文件#import <CoreLocation/CoreLocation.h>
    • 由于iOS8.0之后定位方法的改变,需要在info.plist中进行配置;
    • 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;
    }
    • 获取定位权限
    CLLocationManager *manager = [[CLLocationManager alloc] init];
    [manager requestAlwaysAuthorization];//一直获取定位信息
    [manager requestWhenInUseAuthorization];//使用的时候获取定位信息
    • 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;
    }
    }
  • 2.5 推送权限

    • 检查是否有通讯权限
    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;
    }
    • 获取推送权限
    UIUserNotificationSettings *setting = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge categories:nil];
    [[UIApplication sharedApplication] registerUserNotificationSettings:setting];
  • 2.6 通讯录权限

    • iOS9.0之前
    • 导入头文件#import <AddressBook/AddressBook.h>
    • 检查是否有通讯录权限
    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;
    }
    • 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");
    }
    });
    • iOS9.0及以后
    • 导入头文件#import <Contacts/Contacts.h>
    • 检查是否有通讯录权限
    CNAuthorizationStatus status = [CNContactStore authorizationStatusForEntityType:CNEntityTypeContacts];
    switch (status) {
    case CNAuthorizationStatusAuthorized: {
    NSLog(@"Authorized:");
    }
    break;
    case CNAuthorizationStatusDenied:{
    NSLog(@"Denied");
    }
    break;
    case CNAuthorizationStatusRestricted:{
    NSLog(@"Restricted");
    }
    break;
    case CNAuthorizationStatusNotDetermined:{
    NSLog(@"NotDetermined");
    }
    break;
    }
    • 获取通讯录权限
    CNContactStore *contactStore = [[CNContactStore alloc] init];
    [contactStore requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error) {
    if (granted) { NSLog(@"Authorized"); }
    else { NSLog(@"Denied or Restricted");
    }
    }];
  • 2.7 日历、备忘录权限

    • 导入头文件
    • 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;
    }
    • 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");
    }
    }];

3、最后一点

  • 所有获取权限的方法,多用于用户第一次操作应用,iOS 8.0之后,将这些设置都整合在一起,并且可以开启或关闭相应的权限。所有的权限都可以通过下面的方法打开:
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];

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