由于新項目需要用到錄像功能，在網(wǎng)上找了點資料，自己做個了功能非常簡單的demo，記錄下來，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:@"開始錄制"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;// 允許編輯
[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)) {
//保存視頻到相簿
UISaveVideoAtPathToSavedPhotosAlbum(urlStr,self,@selector(video:didFinishSavingWithError:contextInfo:),nil);
}
}
[pickerdismissViewControllerAnimated:YEScompletion:nil];
}
- (void)video:(NSString*)videoPath didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo{
if(error) {
NSLog(@"保存視頻過程中發(fā)生錯誤，錯誤信息:%@",error.localizedDescription);
}else{
NSLog(@"視頻保存成功");
UIImage*img = [selfgetImage:videoPath];
self.showImageView.image= img;
}
}
#pragma mark - 將視頻預覽圖通過視頻URL取出來
- (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
```
后續(xù)會根據(jù)需求的不同來改進這個demo。
