//原理,还是调用UIImagePickerController控制器,设置Type为视频
#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface ViewController ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
//打开控制器
UIImagePickerController *picker=[[UIImagePickerController alloc]init];
//picker.sourceType=UIImagePickerControllerSourceTypeCamera;//设置摄像头类型 摄像头
//picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;//打开相册,获取资源,视频和图片用户拍摄的照片可以删除,
//picker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;//打开相册库,用户与电脑同步的,不能删除
picker.delegate=self;
//设置媒体类型
picker.mediaTypes=[UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
//显示控制器
[self presentViewController:picker animated:YES completion:nil];
}
#pragma mark UIImagePickerControllerDelegate
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
//如果是视频返回的是URL
NSURL*url=info[UIImagePickerControllerMediaURL];
//使用媒体工具 压缩
[self compressVideo:url];
//关闭控制器
[self dismissViewControllerAnimated:YES completion:nil];
}
//压缩
-(void)compressVideo:(NSURL*)url
{
//使用媒体工具(AVFoundation框架下的)
//Asset 资源 可以是图片音频视频
AVAsset *asset=[AVAsset assetWithURL:url];
//设置压缩的格式
AVAssetExportSession *session=[AVAssetExportSession exportSessionWithAsset:asset presetName:AVAssetExportPresetMediumQuality];//mediumquality:中等质量
//设置导出路径
NSString *path=[NSTemporaryDirectory() stringByAppendingPathComponent:@"needAV.mov"];
//创建文件管理类 导出失败,删除已经导出的
NSFileManager *manager=[[NSFileManager alloc]init];
//删除已经存在的
[manager removeItemAtPath:path error:NULL];
//设置到处路径
session.outputURL=[NSURL fileURLWithPath:path];
//设置输出文件的类型
session.outputFileType=AVFileTypeQuickTimeMovie;
//开辟子线程处理耗时操作
[session exportAsynchronouslyWithCompletionHandler:^{
NSLog(@"导出完成!路径:%@",path);
}];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
@end