将 UIButton 添加到 UIScrollView [英] Adding a UIButton to UIScrollView

问题描述

我正在尝试将 UIButton 添加到 UIScrollView.

I am trying to add the UIButton to UIScrollView.

我添加了带有背景图像 *(size: 320 * 620)* 的 UIImageView.然后我将这个 UIImageView 添加到 UIScrollView，它工作正常.

I have added the UIImageView with background image *(size: 320 * 620)*. Then I added this UIImageView to UIScrollView, and It works fine.

但现在我想在以下位置添加 UIButton :(60, 500);(在滚动后出现的屏幕下方).

But now I want to add UIButton at position at : (60, 500); (below screen that would appear after scrolling).

我尝试了以下代码，但按钮添加在 UIView 上而不是滚动视图上.按钮未显示在顶部.

I have tried following code, but the button is added on UIView not on scrollview. Button is not getting displayed on the top.

代码:

- (void)viewDidLoad     
{    
    [super viewDidLoad];
    self.navigationController.navigationBar.hidden = TRUE;

    UIImageView *tempImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"SingleModelVar.png"]];
    self.imageView = tempImageView;
    [tempImageView release];

    imageView.userInteractionEnabled = YES;

    scrollView=[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)]; //fit to screen

    //scrollView.delaysContentTouches = NO;

    scrollView.contentSize = CGSizeMake(320, imageView.frame.size.height);         //imageView.frame.size.height=620 here
    scrollView.maximumZoomScale = 4.0;
    scrollView.minimumZoomScale = 0.75;
    scrollView.clipsToBounds = YES;
    scrollView.delegate = self;

    //The Problem begins ..........

    btnStartDate=[[UIButton alloc] initWithFrame:CGRectMake(60,500,100,20)];
    [scrollView addSubview:btnStartDate];
    //[self.view addSubview:btnStartDate];

    btnEndDate=[[UIButton alloc] initWithFrame:CGRectMake(60,530,100,20)];
    [scrollView addSubview:btnEndDate];
    //[self.view addSubview:btnEndDate];

    [scrollView addSubview:imageView];
    [[self view] addSubview:scrollView];
}

推荐答案

它没有显示在顶部，因为您在添加 imageView 之前添加了它们.把 [scrollView addSubview:imageView]; 放在 btnStartDate=[[UIButton alloc] initWithFrame:CGRectMake(60,500,100,20)];

it is not displayed at the top because you added them before you added the imageView. Put [scrollView addSubview:imageView]; before btnStartDate=[[UIButton alloc] initWithFrame:CGRectMake(60,500,100,20)];

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