ios 上传视频选择视频封面(videoCoverController)

起初看到这个功能我是拒绝的,之前做的视频上传都是获取特定的帧数当封面,没有刻意的去选择封面,但是需求已定,随后网上也找了下,没有类似的,于是乎就自己写了一个,有什么改进的地方可以互相交流,话不多说直接上代码了

1.打开相册,系统相册用的很顺手,所以一直就用系统的相册

//两个代理

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIImageView *coverImageView;

@end

//代理方法

//打开相册

- (void)openImagePickerController:(UIImagePickerControllerSourceType)type

{

if (![UIImagePickerController isSourceTypeAvailable:type]) return;

UIImagePickerController *ipc = [[UIImagePickerController alloc] init];

//视频最大时间

ipc.videoMaximumDuration = 30;

ipc.view.backgroundColor = [UIColor whiteColor];

ipc.sourceType = type;

ipc.delegate = self;

//只打开视频

ipc.mediaTypes = @[(NSString *)kUTTypeMovie];

//视频上传质量

ipc.videoQuality = UIImagePickerControllerQualityTypeHigh;

[self presentViewController:ipc animated:YES completion:nil];

}

#pragma mark - UIImagePickerControllerDelegate

/**

* 从UIImagePickerController选择完图片后就调用(拍照完毕或者选择相册图片完毕)

*/

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

CZHWeakSelf(self);

NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];

if ([mediaType isEqualToString:(NSString *)kUTTypeMovie]) {

//如果是视频

NSURL *url = info[UIImagePickerControllerMediaURL];

//计算相册视频时长

NSDictionary *videoDic = [CZHTool getLocalVideoSizeAndTimeWithSourcePath:url.absoluteString];

int videoTime = [[videoDic valueForKey:@"duration"] intValue];

//视频限制的长度

NSUInteger limitTime = 30;

if (videoTime > limitTime) {

[picker dismissViewControllerAnimated:YES completion:nil];

return;

}

//把系统相册mov格式转换成mp4格式

[CZHTool convertMovTypeIntoMp4TypeWithSourceUrl:url convertSuccess:^(NSURL *path) {

CZHStrongSelf(self);

[picker dismissViewControllerAnimated:YES completion:nil];

//选择封面控制器

CZHChooseCoverController *chooseCover = [[CZHChooseCoverController alloc] init];

//本地路径

chooseCover.videoPath = path;

//选择封面的block,把封面image回调

chooseCover.coverImageBlock = ^(UIImage *coverImage) {

self.coverImageView.image = coverImage;

//上传视频操作

//[self changeWithUploadSource:path];

//上传封面操作

//[self uploadCoverWithImage:coverImage];

};

[self presentViewController:chooseCover animated:YES completion:nil];

}];

}

}

// 取消图片选择调用此方法

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

// dismiss UIImagePickerController

[self dismissViewControllerAnimated:YES completion:nil];

}

2.选择封面控制器

//截取几张图片放在底部用作展示,我是用collectionview做展示

AVURLAsset * asset = [AVURLAsset assetWithURL:self.videoPath];

CMTime  time = [asset duration];

self.timeValue = time.value;

self.timeScale = time.timescale;

if (time.value < 1) {

[self dismissViewControllerAnimated:YES completion:nil];

return;

}

NSDictionary *opts = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO] forKey:AVURLAssetPreferPreciseDurationAndTimingKey];

AVURLAsset *urlAsset = [AVURLAsset URLAssetWithURL:self.videoPath options:opts];

AVAssetImageGenerator *generator = [AVAssetImageGenerator assetImageGeneratorWithAsset:urlAsset];

generator.appliesPreferredTrackTransform = YES;

//总帧数/展示的总数量

long long baseCount = time.value / PHOTP_COUNT;

//取出PHOTP_COUNT张图片,存放到数组,用于collectionview

for (NSInteger i = 0 ; i < PHOTP_COUNT; i++) {

NSError *error = nil;

//每隔baseCount帧取一帧存起来,一共PHOTP_COUNT张

CGImageRef img = [generator copyCGImageAtTime:CMTimeMake(i * baseCount, time.timescale) actualTime:NULL error:&error];

{

UIImage *image = [UIImage imageWithCGImage:img];

[self.photoArrays addObject:image];

}

}

//把存的存的几张图片用collectionview展示出来

CGRect collectionViewF = CGRectMake(0,  CZH_ScaleHeight(461), ScreenWidth, CZH_ScaleHeight(62.5));

UICollectionView *collectionView = [[UICollectionView alloc] initWithFrame:collectionViewF collectionViewLayout:layout];

collectionView.dataSource = self;

collectionView.backgroundColor = [UIColor clearColor];

[collectionView registerClass:[CZHChooseCoverCell class] forCellWithReuseIdentifier:ID];

[self.view addSubview:collectionView];

self.collectionView  = collectionView;

//在collectionview上面覆盖一个slider用于滑动选择图片

UIImage *selected = [UIImage imageNamed:@"slider_select"];

UIImage *deselected = [UIImage imageNamed:@"slider_deselect"];

UISlider *slider = [[UISlider alloc] init];

slider.frame = CGRectMake(0,  CZH_ScaleHeight(461), ScreenWidth, CZH_ScaleHeight(62.5));

[slider setThumbImage:deselected forState:UIControlStateNormal];

[slider setThumbImage:selected forState:UIControlStateHighlighted];

//透明的图片

UIImage *image = [CZHTool imageWithColor:[UIColor clearColor] size:CGSizeMake(1, 1)];

[slider setMinimumTrackImage:image forState:UIControlStateNormal];

[slider setMaximumTrackImage:image forState:UIControlStateNormal];

slider.maximumValue = self.timeValue;

slider.minimumValue = 0;

[slider addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventValueChanged];

[self.view addSubview:slider];

//默认选取第一帧展示

[self chooseWithTime:0];

//滑动slider的操作

- (void)valueChange:(UISlider *)sender {

int timeValue = sender.value;

[self chooseWithTime:timeValue];

}

- (void)chooseWithTime:(CMTimeValue)time {

NSDictionary *opts = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO] forKey:AVURLAssetPreferPreciseDurationAndTimingKey];

AVURLAsset *urlAsset = [AVURLAsset URLAssetWithURL:self.videoPath options:opts];

AVAssetImageGenerator *generator = [AVAssetImageGenerator assetImageGeneratorWithAsset:urlAsset];

generator.appliesPreferredTrackTransform = YES;

//    generator.maximumSize = CGSizeMake(ScreenWidth, ScreenHeight);

NSError *error = nil;

CGImageRef img = [generator copyCGImageAtTime:CMTimeMake(time, self.timeScale) actualTime:NULL error:&error];

{

UIImage *image = [UIImage imageWithCGImage:img];

self.imageView.image = image;

}

}

//点击返回按钮和完成按钮的操作

- (void)buttonClick:(UIButton *)sender {

if (sender.tag == CZHChooseCoverControllerButtonTypeBack) {

[self dismissViewControllerAnimated:YES completion:nil];

} else if (sender.tag == CZHChooseCoverControllerButtonTypeComplete) {

//封面图片回调

if (_coverImageBlock) {

_coverImageBlock(self.imageView.image);

}

[self dismissViewControllerAnimated:YES completion:nil];

}

}

ps.模拟器相册没有视频的话可以用下面代码把项目的视频保存到相册

NSMutableArray *videoArray = [NSMutableArray array];

//工程中类型是MP4的文件数组

NSArray *movs = [[NSBundle mainBundle] pathsForResourcesOfType:@"mp4" inDirectory:nil];

[videoArray addObjectsFromArray:movs];

for (id item in videoArray) {

//循环保存到相册

if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(item)) {

UISaveVideoAtPathToSavedPhotosAlbum(item, self, nil, NULL);

}

}

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