UIImagePickerController不显示视频的问题

UIImagePickerController不显示视频的问题

一、问题

打开系统相册，里面只有照片没有视频。

二、分析

打开系统媒体库，发现在iOS12上只显示照片，不显示视频，iOS13显示照片和视频，其他系统未测试，代码如下：

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.allowsEditing = NO;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil];

先来看一下picker的资源类型

typedef NS_ENUM(NSInteger, UIImagePickerControllerSourceType) {
    UIImagePickerControllerSourceTypePhotoLibrary,
    UIImagePickerControllerSourceTypeCamera,
    UIImagePickerControllerSourceTypeSavedPhotosAlbum
} __TVOS_PROHIBITED;

别分是媒体库、相机、相册，想来媒体库中应该包含视频和照片，但是在iOS12.4的手机上就是没显示视频。

三、解决

显示视频

picker.mediaTypes = [NSArray arrayWithObjects:@"public.movie", nil];

显示照片

picker.mediaTypes = [NSArray arrayWithObjects:@"public.image", nil];

显示照片和视频

picker.mediaTypes = [NSArray arrayWithObjects:@"public.image", @"public.movie",nil];

设置为拍照或者录像

picker.mediaTypes = @[(NSString*)kUTTypeImage,(NSString*)kUTTypeMovie];

问题解决了，代码如下：

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.allowsEditing = NO;
picker.mediaTypes = [NSArray arrayWithObjects:@"public.image", @"public.movie",nil];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil];

四、代码

打开媒体库显示视频

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.allowsEditing = NO;
//只显示视频
//picker.mediaTypes = [NSArray arrayWithObjects:@"public.movie",nil];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.mediaTypes = @[(NSString *)kUTTypeMovie];//选择视频
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil];

使用picker.mediaTypes = [NSArray arrayWithObjects:@"public.movie",nil]; p或 picker.mediaTypes = @[(NSString *)kUTTypeMovie];//选择视频

sourceType使用picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum或者picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary都可以。

打开照片显示照片和视频

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:picker.sourceType];
picker.delegate = self;
picker.editing = NO;
[self presentViewController:picker animated:YES completion:nil];