由于新项目需要用到录像功能，在网上找了点资料，自己做个了功能非常简单的demo，记录下来，方便以后使用。
```
#import"ViewController.h"
#import AVFoundation/AVFoundation.h
#import MobileCoreServices/MobileCoreServices.h
@interfaceViewController()
@property(nonatomic,strong)UIImagePickerController* pickerController;
@property(nonatomic,strong)AVPlayer* player;
@property(nonatomic,strong)UIImageView* showImageView;
@end
@implementationViewController
- (void)viewDidLoad {
[superviewDidLoad];
UIButton*btn = [UIButtonbuttonWithType:UIButtonTypeSystem];
[btnsetTitle:@"开始录制"forState:UIControlStateNormal];
[btnsetTitleColor:[UIColorredColor]forState:UIControlStateNormal];
btn.frame=CGRectMake(100,100,100,50);
[self.viewaddSubview:btn];
[btnaddTarget:selfaction:@selector(btnClick:)forControlEvents:UIControlEventTouchUpInside];
self.showImageView= [[UIImageViewalloc]init];
self.showImageView.frame=CGRectMake(100,250,100,100);
[self.viewaddSubview:self.showImageView];
}
- (void)btnClick: (UIButton*)btn {
UIImagePickerController*vc = [[UIImagePickerControlleralloc]init];
vc.sourceType=UIImagePickerControllerSourceTypeCamera;
vc.cameraDevice=UIImagePickerControllerCameraDeviceRear;
vc.mediaTypes=@[(NSString*)kUTTypeMovie];
vc.videoQuality=UIImagePickerControllerQualityTypeIFrame1280x720;
vc.cameraCaptureMode=UIImagePickerControllerCameraCaptureModeVideo;
vc.allowsEditing=YES;// 允许编辑
[selfpresentViewController:vcanimated:YEScompletion:nil];
}
- (void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString* mediaType = [infoobjectForKey:UIImagePickerControllerMediaType];
if([mediaTypeisEqualToString:(NSString*)kUTTypeMovie]) {
NSURL* url = [infoobjectForKey:UIImagePickerControllerMediaURL];
NSString* urlStr = [urlpath];
if(UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(urlStr)) {
//保存视频到相簿
UISaveVideoAtPathToSavedPhotosAlbum(urlStr,self,@selector(video:didFinishSavingWithError:contextInfo:),nil);
}
}
[pickerdismissViewControllerAnimated:YEScompletion:nil];
}
- (void)video:(NSString*)videoPath didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo{
if(error) {
NSLog(@"保存视频过程中发生错误，错误信息:%@",error.localizedDescription);
}else{
NSLog(@"视频保存成功");
UIImage*img = [selfgetImage:videoPath];
self.showImageView.image= img;
}
}
#pragma mark - 将视频预览图通过视频URL取出来
- (UIImage*)getImage:(NSString*)videoURL{
AVURLAsset*asset = [[AVURLAssetalloc]initWithURL:[NSURLfileURLWithPath:videoURL]options:nil];
AVAssetImageGenerator*gen = [[AVAssetImageGeneratoralloc]initWithAsset:asset];
gen.appliesPreferredTrackTransform=YES;
CMTimetime =CMTimeMakeWithSeconds(0.0,600);
NSError*error =nil;
CMTimeactualTime;
CGImageRefimage = [gencopyCGImageAtTime:timeactualTime:&actualTimeerror:&error];
UIImage*thumb = [[UIImagealloc]initWithCGImage:image];
CGImageRelease(image);
returnthumb;
}
@end
```
后续会根据需求的不同来改进这个demo。
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