Question

我正在尝试制作一个具有类似于VSCO应用程序的导入页面的应用程序。但是在用户从图库中选择多张照片后，我无法确定如何在视图中显示所有图片，最大应为10张照片。

要获得图像，我使用了此代码，它对于选择一张图片非常有用：

Texture2D tex;

void Start() {
    tex = new Texture2D(1, 1);
    //get the color printed by calling:
    StartCoroutine(CaptureTempArea());
}

IEnumerator CaptureTempArea() {
    yield return new WaitForEndOfFrame();
    Vector2 pos = UICamera.lastEventPosition;
    tex.ReadPixels(new Rect(pos.x, pos.y, 1, 1), 0, 0);
    tex.Apply();
    Color color = tex.GetPixel(0, 0);
    Debug.Log(ColorToHex(color));
}

void OnDestroy() {
    Destroy(tex);
}

}

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

UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
[self dismissViewControllerAnimated:false completion:nil];

// transfer to the main screen
dispatch_async(dispatch_get_main_queue(), ^{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    PreviewVC *prevVC = (PreviewVC *)[storyboard instantiateViewControllerWithIdentifier:@"PreviewVC"];


    passedImage = image;

    prevVC.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
    [self presentViewController:prevVC animated:true completion:nil];
});

}

在使用预览视图显示导入的照片之后，可以对其进行编辑：

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

UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
[self dismissViewControllerAnimated:false completion:nil];

// Go to the Main Screen
dispatch_async(dispatch_get_main_queue(), ^{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    PreviewVC *prevVC = (PreviewVC *)[storyboard instantiateViewControllerWithIdentifier:@"PreviewVC"];

    // Passing Image to Preview VC
    passedImage = image;

    prevVC.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
    [self presentViewController:prevVC animated:true completion:nil];
});

Answer 1

如果您的想法是在PreviewVC中构建多个图像，则让其启动选择器并将其保留图像阵列作为属性。该图像数组又成为预览vc中表视图的数据源。粗略的轮廓...

// in PreviewVC.m
// in the private interface
@property (nonatomic, weak) IBOutlet UITableView *tableView;  // attach this in IB, don't forget to set datasource to this vc
@property (nonatomic, strong) NSArray *images;

- (void)userDidPressPickImageButton:(id)sender {
    // launch image picker vc from here
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
    [self dismissViewControllerAnimated:false completion:nil];
    image = [self imageWithImage:image scaledToSize:someSize]; // move this method here, too

    // here's the key
    [self.images addObject:image];
    [self.tableView reloadData];
}

让表视图数据源回答self.images.count以获得numberOfRows，当然，cellForRow必须使用self.images[indexPath.row]配置单元格

如何用物镜显示多张导入的照片

1 个答案: