iOS摄像头拍照或者摄像的数据写入到文件

最新推荐文章于 2021-11-17 16:46:57 发布

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最新推荐文章于 2021-11-17 16:46:57 发布

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本文提供了一段详细的iOS代码示例，展示了如何利用UIImagePickerController在应用程序中集成拍照和录像功能，并将拍摄的内容保存到文件中。

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如果您的App里需要获得由系统自带的照相机、摄像机和录音软件所生成的文件。可以借鉴以下代码来调用iPhone摄像头拍照或者摄像的功能，并把获得的数据直接写入到文件。

//这一段是,点击一个takePicture按钮的操作.

 
        - (IBAction)takePicture:(id)sender { 
       
        UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 
       
        if 
        ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { 
       
        picker.sourceType = UIImagePickerControllerSourceTypeCamera; 
       
        NSArray *temp_MediaTypes = [UIImagePickerController availableMediaTypesForSourceType:picker.sourceType]; 
       
        picker.mediaTypes = temp_MediaTypes; 
       
        picker.delegate = self; 
       
        picker.allowsImageEditing = YES;  
       
        } 
       
        [self presentModalViewController:picker animated:YES]; 
       
        [picker release]; 
       
        }

//下面两个函数是遵守 UIImagePickerControllerDelegate这个协议所实现的类.这样就能够完整的实现,获取照片或者视频,然后写入文件的过程.

 
        - ( 
        void 
        )imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
       
        { 
       
        NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType]; 
       
        BOOL 
         success; 
       
        NSFileManager *fileManager = [NSFileManager defaultManager]; 
       
        NSError *error; 
       
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
       
        NSString *documentsDirectory = [paths objectAtIndex:0]; 
       
        if 
         ([mediaType isEqualToString:@ 
        "public.image" 
        ]){ 
       
        UIImage *image = [info objectForKey:@ 
        "UIImagePickerControllerEditedImage" 
        ]; 
       
        ;    NSLog(@“found an image”); 
       
        NSString *imageFile = [documentsDirectory stringByAppendingPathComponent:@ 
        "temp.jpg" 
        ]; 
       
        ;    NSLog(@“%@”, ,imageFile); 
       
        success = [fileManager fileExistsAtPath:imageFile]; 
       
        if 
        (success) { 
       
        success = [fileManager removeItemAtPath:imageFile error:>error]; 
       
        } 
       
        imageView.image = image; 
       
        [UIImageJPEGRepresentation(image, 1.0f) writeToFile:imageFile atomically:YES]; 
       
        //SETIMAGE(image); 
       
        //CFShow([[NSFileManager defaultManager] directoryContentsAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"]]); 
       
        ;    } 
       
        else 
         if 
        ([mediaType isEqualToString:@ 
        "public.movie" 
        ]){ 
       
        NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL]; 
       
        NSLog(@“%@”, ,videoURL); 
       
        NSLog(@“found a video”); 
       
        NSData *videoData = [NSData dataWithContentsOfURL:videoURL]; 
       
        /****************************************/ 
       
        NSString *videoFile = [documentsDirectory stringByAppendingPathComponent:@ 
        "temp.mov" 
        ]; 
       
        ;    NSLog(@“%@”, ,videoFile); 
       
        success = [fileManager fileExistsAtPath:videoFile]; 
       
        if 
        (success) { 
       
        success = [fileManager removeItemAtPath:videoFile error:>error]; 
       
        } 
       
        [videoData writeToFile:videoFile atomically:YES]; 
       
        //CFShow([[NSFileManager defaultManager] directoryContentsAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"]]); 
       
        ;     
        //NSLog(videoURL); 
       
        } 
       
        [picker dismissModalViewControllerAnimated:YES]; 
       
        } 
       
        - ( 
        void 
        )imagePickerControllerDidCancel:(UIImagePickerController *)picker { 
       
        [picker dismissModalViewControllerAnimated:YES]; 
       
        }