因为相机是相册是日常开发中必不可少的功能，但是因为苹果的隐私政策，每次访问的时候都需要授权，没有授权app是无法访问相册和相机功能的，这样会造成app在用户第一次使用的时候出现一下显示不正常或者没有响应的感觉。
为了能提高用户的体验度，写一下相机相册简单的权限逻辑判断。
1、相册权限：
苹果文档中，相册权限状态有一下情况：
iOS 8.0+
API_AVAILABLE_BEGIN(macos(10.13), ios(8), tvos(10))
typedef NS_ENUM(NSInteger, PHAuthorizationStatus) {
PHAuthorizationStatusNotDetermined = 0, // 用户没有选择User has not yet made a choice with regards to this application
PHAuthorizationStatusRestricted, // 已拒绝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, // 已拒绝User has explicitly denied this application access to photos data.
PHAuthorizationStatusAuthorized //已同意授权 User has authorized this application to access photos data.
};
通过一下方法判断是否继续下一步
需要导入#import <Photos/Photos.h>
PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
if (status == PHAuthorizationStatusRestricted ||
status == PHAuthorizationStatusDenied)
{
//无权限
[SVProgressHUD showErrorWithStatus:@"Please set the Allow APP to access your photo album. Settings > Privacy > Album"];
return ;
}
//第一次进来还没有选择是否授权
else if (status == PHAuthorizationStatusNotDetermined)
{
[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
dispatch_async(dispatch_get_main_queue(), ^{
if (status == PHAuthorizationStatusRestricted || status == PHAuthorizationStatusDenied)
{
// 用户拒绝，跳转到自定义提示页面
}
else if (status == PHAuthorizationStatusAuthorized)
{
// 用户授权，弹出相册对话框
}
});
}];
return;
}
else{
// 用户授权，弹出相册对话框
}
2、相机
同相册一样，相机也是有对应的权限状态
typedef NS_ENUM(NSInteger, AVAuthorizationStatus) {
AVAuthorizationStatusNotDetermined = 0,//没有选择
AVAuthorizationStatusRestricted = 1,//已拒绝
AVAuthorizationStatusDenied = 2,//已拒绝
AVAuthorizationStatusAuthorized = 3,//已授权
} API_AVAILABLE(macos(10.14), ios(7.0)) __WATCHOS_PROHIBITED __TVOS_PROHIBITED;
导入#import <AVFoundation/AVCaptureDevice.h>
AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
if (authStatus == AVAuthorizationStatusRestricted || authStatus ==AVAuthorizationStatusDenied) {
//无权限
return ;
}
else if (authStatus == AVAuthorizationStatusNotDetermined)
{
[AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
if (!granted) {//不允许
}else{//开启
}
}];
return;
}
else
{
//已授权
}
获取麦克风权限逻辑和相机是差不多的只需把AVMediaTypeVideo 替换成AVMediaTypeAudio就可以了。
这就是目前相机、相册和麦克风的权限逻辑了，需要注意的一点是，这些方法大多是异步的，所以如果要在返回后做对应的操作，最好切换到主线程。
