通過調用系統攝像頭拍照,拍視訊,然後寫入檔案

通過調用系統攝像頭拍照,拍視訊,然後寫入檔案的

時間: 2010-06-08 16:50 點選: 294 次

如果您的App裡需要獲得由系統自帶的照相機、錄影機和錄音軟體所生成的檔案。可以借鑒以下代碼來調用iPhone攝像頭拍照或者攝像的功能，并把獲得的資料直接寫入到檔案。 //這一段是 如果您的App裡需要獲得由系統自帶的照相機、錄影機和錄音軟體所生成的檔案。可以借鑒以下代碼來調用iPhone攝像頭拍照或者攝像的功能，并把獲得的資料直接寫入到檔案。

//這一段是,點選一個takePicture按鈕的操作.

- (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];

}

//下面兩個函數是遵守 UIImagePickerControllerDelegate這個協定所實作的類.這樣就能夠完整的實作,擷取照片或者視訊,然後寫入檔案的過程.

- (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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