iOS 判断是否有权限访问相机，相册

1.判断用户是否有权限访问相册

#import <AssetsLibrary/AssetsLibrary.h> ALAuthorizationStatus author =[ALAssetsLibrary authorizationStatus]; if (author == kCLAuthorizationStatusRestricted || author ==kCLAuthorizationStatusDenied) { //无权限 }

可以注意一下下面这个

typedef enum { kCLAuthorizationStatusNotDetermined = 0, // 用户尚未做出选择这个应用程序的问候 kCLAuthorizationStatusRestricted, // 此应用程序没有被授权访问的照片数据。可能是家长控制权限 kCLAuthorizationStatusDenied, // 用户已经明确否认了这一照片数据的应用程序访问 kCLAuthorizationStatusAuthorized // 用户已经授权应用访问照片数据 } CLAuthorizationStatus;

iOS 8 之后推荐用 #import <Photos/Photos.h> 中的判断

PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus]; if (status == PHAuthorizationStatusRestricted || status == PHAuthorizationStatusDenied) { return NO; } return YES;

typedef NS_ENUM(NSInteger, PHAuthorizationStatus) { PHAuthorizationStatusNotDetermined = 0, // 默认还没做出选择 PHAuthorizationStatusRestricted, // 此应用程序没有被授权访问的照片数据 PHAuthorizationStatusDenied, // 用户已经明确否认了这一照片数据的应用程序访问 PHAuthorizationStatusAuthorized // 用户已经授权应用访问照片数据 } NS_AVAILABLE_IOS(8_0);

推荐使用

- (BOOL)isCanUsePhotos { if ([[[UIDevice currentDevice] systemVersion] floatValue] < 8.0) { ALAuthorizationStatus author =[ALAssetsLibrary authorizationStatus]; if (author == kCLAuthorizationStatusRestricted || author == kCLAuthorizationStatusDenied) { //无权限 return NO; } } else { PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus]; if (status == PHAuthorizationStatusRestricted || status == PHAuthorizationStatusDenied) { //无权限 return NO; } } return YES; }

但实际上系统会提示下面一张图，可以不做判断的，哈哈哈

英语环境下的没有权限

2.判断用户是否有权限访问相机

iOS7之前都可以访问相机，iOS7之后访问相机有权限设置，所以还是需要我们手动去设置判断。

  #import <AVFoundation/AVCaptureDevice.h> #import <AVFoundation/AVMediaFormat.h> AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo]; if (authStatus == AVAuthorizationStatusRestricted || authStatus ==AVAuthorizationStatusDenied) { //无权限 }

typedef NS_ENUM(NSInteger, AVAuthorizationStatus) { AVAuthorizationStatusNotDetermined = 0,// 系统还未知是否访问，第一次开启相机时 AVAuthorizationStatusRestricted, // 受限制的 AVAuthorizationStatusDenied, //不允许 AVAuthorizationStatusAuthorized // 允许状态 } NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED;