通过调用系统摄像头拍照,拍视频,然后写入文件

通过调用系统摄像头拍照,拍视频,然后写入文件的

时间: 2010-06-08 16:50 点击: 294 次

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 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];

}

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