獲取相機(jī)、相冊(cè)、麥克風(fēng)、定位等權(quán)限，需要提前在info.plist添加獲取權(quán)限聲明，否則會(huì)崩潰，提示信息如下：

[access] This app has crashed because it attempted to access privacy-sensitive data without a usage description. The app's Info.plist must contain an NSMicrophoneUsageDescription key with a string value explaining to the user how the app uses this data.

一、相機(jī)
首先引入系統(tǒng)庫(kù)

#import <Photos/PHPhotoLibrary.h>

（1）檢測(cè)相機(jī)權(quán)限
首先我們要先了解AVAuthorizationStatus各個(gè)枚舉的含義

typedef NS_ENUM(NSInteger, ALAuthorizationStatus) {
    // 用戶還沒(méi)有關(guān)于這個(gè)應(yīng)用程序做出了選擇
    ALAuthorizationStatusNotDetermined NS_ENUM_DEPRECATED_IOS(6_0, 9_0) = 0, // User has not yet made a choice with regards to this application
    // 這個(gè)應(yīng)用程序未被授權(quán)訪問(wèn)圖片數(shù)據(jù)。用戶不能更改該應(yīng)用程序的狀態(tài),可能是由于活動(dòng)的限制,如家長(zhǎng)控制到位。
    ALAuthorizationStatusRestricted NS_ENUM_DEPRECATED_IOS(6_0, 9_0),        // 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.
    // 用戶已經(jīng)明確否認(rèn)了這個(gè)應(yīng)用程序訪問(wèn)圖片數(shù)據(jù)
    ALAuthorizationStatusDenied NS_ENUM_DEPRECATED_IOS(6_0, 9_0),            // User has explicitly denied this application access to photos data.
    // 用戶授權(quán)此應(yīng)用程序訪問(wèn)圖片數(shù)據(jù)
    ALAuthorizationStatusAuthorized NS_ENUM_DEPRECATED_IOS(6_0, 9_0)        // User has authorized this application to access photos data.
} NS_DEPRECATED_IOS(6_0, 9_0, "Use PHAuthorizationStatus in the Photos framework instead");

- (void) checkVideoStatus
{
    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    switch (authStatus) {
        case AVAuthorizationStatusNotDetermined:
        //沒(méi)有詢問(wèn)是否開(kāi)啟相機(jī)
        self.videoStatus = @"AVAuthorizationStatusNotDetermined";
        break;
        case AVAuthorizationStatusRestricted:
        //未授權(quán)，家長(zhǎng)限制
        self.videoStatus = @"AVAuthorizationStatusRestricted";
        break;
        case AVAuthorizationStatusDenied:
        //未授權(quán)
        self.videoStatus = @"AVAuthorizationStatusDenied";
        break;
        case AVAuthorizationStatusAuthorized:
        //玩家授權(quán)
        self.videoStatus = @"AVAuthorizationStatusAuthorized";
        break;
        default:
        break;
    }

(2)獲取相機(jī)權(quán)限---彈出彈框

 //授權(quán)相機(jī)
- (void)videoAuthAction
{
    [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
        NSLog(@"%@",granted ? @"相機(jī)準(zhǔn)許":@"相機(jī)不準(zhǔn)許");
    }];
}

二、相冊(cè)
首先引入系統(tǒng)庫(kù)

#import <Photos/PHPhotoLibrary.h>

（1）檢測(cè)相冊(cè)權(quán)限

//檢查照片權(quán)限
- (void) checkPhotoStauts{
    PHAuthorizationStatus photoAuthorStatus = [PHPhotoLibrary authorizationStatus];
    switch (photoAuthorStatus) {
        case PHAuthorizationStatusAuthorized:
        self.photoLibraryStatus = @"PHAuthorizationStatusAuthorized";
        break;
        case PHAuthorizationStatusDenied:
        self.photoLibraryStatus = @"PHAuthorizationStatusDenied";
        break;
        case PHAuthorizationStatusNotDetermined:
        self.photoLibraryStatus = @"PHAuthorizationStatusNotDetermined";
        break;
        case PHAuthorizationStatusRestricted:
        self.photoLibraryStatus = @"PHAuthorizationStatusRestricted";
        break;
        default:
        break;
    }
   }

(2)獲取相冊(cè)權(quán)限---彈出彈框

//授權(quán)照片
- (void)phontLibraryAction{
    [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
    }];
}

三、麥克風(fēng)
首先引入系統(tǒng)庫(kù)

#import <AVFoundation/AVFoundation.h>

(1)檢測(cè)麥克風(fēng)權(quán)限

- (void) checkAudioStatus{
    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio];
    switch (authStatus) {
        case AVAuthorizationStatusNotDetermined:
        //沒(méi)有詢問(wèn)是否開(kāi)啟麥克風(fēng)
        self.audioStatus = @"AVAuthorizationStatusNotDetermined";
        break;
        case AVAuthorizationStatusRestricted:
        //未授權(quán)，家長(zhǎng)限制
        self.audioStatus = @"AVAuthorizationStatusRestricted";
        break;
        case AVAuthorizationStatusDenied:
        //玩家未授權(quán)
        self.audioStatus = @"AVAuthorizationStatusDenied";
        break;
        case AVAuthorizationStatusAuthorized:
        //玩家授權(quán)
        self.audioStatus = @"AVAuthorizationStatusAuthorized";
        break;
        default:
        break;
    }
}

（2）獲取麥克風(fēng)權(quán)限----彈出彈框

[AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
           NSLog(@"%@",granted ? @"麥克風(fēng)準(zhǔn)許":@"麥克風(fēng)不準(zhǔn)許");
       }];

四、定位---
首先引入系統(tǒng)庫(kù)

#import <CoreLocation/CLLocationManager.h>

（1）獲取定位權(quán)限

CLAuthorizationStatus status = [CLLocationManager authorizationStatus]

下面是CLAuthorizationStatus各個(gè)值的含義

授權(quán)狀態(tài)為枚舉值：
kCLAuthorizationStatusNotDetermined                  //用戶尚未對(duì)該應(yīng)用程序作出選擇
kCLAuthorizationStatusRestricted                     //應(yīng)用程序的定位權(quán)限被限制 
kCLAuthorizationStatusAuthorizedAlways               //一直允許獲取定位
kCLAuthorizationStatusAuthorizedWhenInUse            //在使用時(shí)允許獲取定位
kCLAuthorizationStatusAuthorized                     //已廢棄，相當(dāng)于一直允許獲取定位
kCLAuthorizationStatusDenied                         //拒絕獲取定位

(2)使用高德地圖時(shí)，遇到了不彈出定位彈框的情況，原因是沒(méi)有添加下面的兩行代碼導(dǎo)致
當(dāng)前項(xiàng)目使用的是高德地圖，高德地圖更新后，需要設(shè)置這兩行代碼，否則，不會(huì)彈出獲取權(quán)限彈框

 [AMapLocationManager updatePrivacyAgree:AMapPrivacyAgreeStatusDidAgree];
    [AMapLocationManager updatePrivacyShow:AMapPrivacyShowStatusDidShow privacyInfo:AMapPrivacyInfoStatusDidContain]