iOS:检测多媒体(相机、相册、麦克风)设备权限,弹框提示

一、感言

新年伊始,万象更新,一转眼,就2019年了。

作为一个科班生,从事移动端开发好几年了,回顾曾经的摸爬滚打,兢兢业业,严格的来说,多少算是入行了。

过去成绩如何暂且不说,新的一年,我当加倍努力,凤凰涅槃,浴火重生。

 

二、介绍

在项目中,多媒体的使用非常常见,那么,询问设备的权限必不可少。

优点:这么做极大的增强了用户体验,友好地告知用户去开启权限。

例如:相机的使用权限、相册的使用权限、麦克风的使用权限等

 

三、代码

1、相机的使用权限 (导入 #import <AVFoundation/AVFoundation.h>

if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
     [self showAlertMessage:@"该设备不支持相机功能"];
     return;
}

AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
if(authStatus == AVAuthorizationStatusRestricted || authStatus == AVAuthorizationStatusDenied){
     [self showAlertMessage:@"应用相机权限受限,请在设置中启用"];
     return;
 }

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil];

2、相册的使用权限(导入  #import<Photos/PHPhotoLibrary.h>

if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
     [self showAlertMessage:@"该设备不支持相册功能~"];
     return;
}

PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
if (status == PHAuthorizationStatusRestricted || status == PHAuthorizationStatusDenied){
    [self showAlertMessage:@"应用相册权限受限,请在设置中启用"];
    return;
}
    
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil];

3、麦克风的使用权限(导入 #import <AVFoundation/AVFoundation.h>)

AVAuthorizationStatus audioAuthStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio];
    
if (audioAuthStatus == AVAuthorizationStatusNotDetermined) {  //未询问用户是否授权
    //第一次询问用户是否进行授权,只会调用一次
    [AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
       if (!granted) {
          dispatch_async(dispatch_get_main_queue(), ^{ //手动禁止了授权
             [self showAlertMessage:@"您已禁用了麦克风,请到设置中开启后重试~"];
          });
        }
    }];
 }
 else if (audioAuthStatus == AVAuthorizationStatusAuthorized) { //麦克风已开启
     [[RecordUtility shareRecordUtility] startRecord]; //开始录音
 }
 else{ //未授权
     [self showAlertMessage:@"您未开启麦克风权限,请到设置中开启后重试~"];
 }

 注意:跳转到设置中开启权限(CCBlcokAlertView是继承自UIAlertView的alertView,自己自定义一下吧,简单)

-(void)showAlertMessage:(NSString *)message{
    CCBlockAlertView *alertView = [[CCBlockAlertView alloc] initWithTitle:@"提示" message:message delegate:nil cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
    alertView.delegate = alertView;
    alertView.blockAlertViewDidDismissWithButtonIndex = ^(CCBlockAlertView *blockAlertView, int buttonIndex) {
        if (buttonIndex == 1) { // 点击了去设置,跳转设置
            NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
            if ([[UIApplication sharedApplication] canOpenURL:url]) {
                [[UIApplication sharedApplication] openURL:url];
            }
        }
    };
    [alertView show];
}

 

posted @ 2019-01-02 17:51  XYQ全哥  阅读(1006)  评论(0编辑  收藏  举报