UITextView子视图UIImageView隐藏输入的文本并滚动文本iPhone？

Question

我的iPhone应用程序中有UITextView 。 在UITextView i have added UIImageView as subview 。 当输入的文本到达final height the texts are scrolling to top 。 而是UIImageView (with image) also scrolling top 。 如何处理停止图像滚动并允许文本滚动？ 这是我的代码供您参考，

    messageTextView = [[UITextView alloc] initWithFrame:CGRectMake(35, 5, 210, 30)];
    messageTextView.delegate = self;
    messageTextView.backgroundColor = [UIColor clearColor];
    messageTextView.clipsToBounds = YES;  
    messageTextView.font = [UIFont fontWithName:@"Helvetica" size:14];
    messageTextView.autoresizingMask = UIViewAutoresizingFlexibleWidth;

    textViewImageView = [[UIImageView alloc]initWithFrame: CGRectMake(0, 0, 210, 30)];
    textViewImageView.image = [UIImage imageNamed: @"textbg.png"];
    textViewImageView.contentMode    = UIViewContentModeScaleToFill;
    textViewImageView.contentStretch = CGRectMake(0.5, 0.5, 0, 0);  
    [messageTextView addSubview: textViewImageView];

    [messageTextView sendSubviewToBack: textViewImageView];
    [messageTextView addSubview:textViewLabel];

有谁可以帮我解决这个问题？ 提前致谢。 期待你的回复。

Answer 1

你考虑过将imageView放在textView后面吗？ 或者是否有任何理由禁止这样的布局？

类似的东西：

UITextView *messageTextView = [[UITextView alloc] initWithFrame:CGRectMake(35, 5, 210, 30)];
// ...
messageTextView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[self.view addSubview:messageTextView];

UIImageView *textViewImageView = [[UIImageView alloc] initWithFrame:CGRectMake(35, 5, 210, 30)];
// ...
textViewImageView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[self.view addSubview:textViewImageView];

[self.view sendSubviewToBack:textViewImageView];

Answer 2

也许这可能有所帮助。 使用scrollview委托在图像到达边界时重新定位图像。

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    if (scrollView.contentOffset.y >= scrollView.contentSize.height - scrollView.frame.size.height) {

        CGRect imageFrame = textViewImageView.frame;
        imageFrame.origin.y = scrollView.contentOffset.y - (scrollView.contentSize.height - scrollView.frame.size.height);
        textViewImageView.frame = imageFrame;

    }       
}

Answer 3

这应该工作：

[yourTxtView setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"your image.png"]]];