使用数组创建按钮 [英] Creating buttons with an Array

问题描述

我有 44 个按钮要添加到滚动视图中，并且我试图使用一系列数组来执行此操作.我有用于文件名的名称字符串、图片的 Y 尺寸(所有 x 都相同)和其他一些的数组.

I have 44 buttons that I am adding to a scrollview and I was trying to use a series of arrays to do so. I have arrays for the name strings of the filenames, for the Y sizes of the pics (all x's are the same) and a few others.

我在 viewDidLoad 中运行该方法的代码是这样的:

The code that I have in my viewDidLoad that runs the method is this:

for (int i = 0; i < 44; i++) {
    [self makeLabelsAndButtons:i];
}

makeLabelsAndButtons 方法在这里:

And the method makeLabelsAndButtons is here:

-(void)makeLabelsAndButtons:(NSInteger *)indexPath{
NSString *nameString = [nameArray objectAtIndex:indexPath];
NSString *picString = [picArray objectAtIndex:indexPath];
NSInteger picNumb = [[numbers objectAtIndex:indexPath] integerValue];
NSInteger picXnum = [[picXCoords objectAtIndex:indexPath] integerValue];

Button = [UIButton buttonWithType:UIButtonTypeCustom];
[Button addTarget:self action:@selector(presPressed:)
  forControlEvents:UIControlEventTouchUpInside];
Button.frame = CGRectMake(160.0, 240.0, 220.0, picNumb);
Button.center = CGPointMake(picXnum, 200.0);
[Button setBackgroundImage:[UIImage imageNamed:picString] forState: UIControlStateNormal];
[ScrollView addSubview:Button];
[ScrollView insertSubview:Button atIndex:1];

NSLog(@"name: %@, pic:%@, picY:%i", nameString, picString, picNumb);

}

没有添加按钮，但我没有收到任何错误.我真的不确定我做错了什么

The buttons are not being added, but I get no errors. I'm really not sure what I'm doing wrong

感谢您的帮助！

这就是我初始化滚动视图的方式

This is how I'm initializing my scrollview

ScrollView=[[UIScrollView alloc]initWithFrame:CGRectMake(0,0,320,480)];
ScrollView.showsVerticalScrollIndicator=YES;
ScrollView.scrollEnabled=YES;
ScrollView.bounces = YES;
ScrollView.userInteractionEnabled=YES;
[self.view addSubview:ScrollView];
[self.view insertSubview:ScrollView atIndex:1];
ScrollView.contentSize = CGSizeMake(20000,480);

通过 NSLogs 系统，我确定按钮没有添加到视图中，我不知道为什么.

Via a system of NSLogs I've determined that the buttons aren't being added to the view and I don't know why.

推荐答案

看起来你的 scrollView 是水平滚动的.

It seems like your scrollView is horizontally scrollable.

你可以试试

-(void)addButtonsToScrollView
{
    //X Offset for button seperation 
    CGFloat xOffset = 10.0f;

    NSUInteger buttonCount = 0;
    //In each iteration buttonFrame would be adjusted to next buttonFrame
    //This would be used to find the contentSize of scrollView
    CGRect buttonFrame = CGRectMake(xOffset, 240.0, 220.0, 40.0f);
    while (buttonCount<44)
    {
        NSString *nameString = nameArray[buttonCount];
        NSString *picString = picArray[buttonCount];

        CGFloat picNumb = [numbers[buttonCount] floatValue];
        CGFloat picXnum = [picXCoords[buttonCount] floatValue];

        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

        [button addTarget:self
                   action:@selector(presPressed:)
         forControlEvents:UIControlEventTouchUpInside];

        buttonFrame.origin.y = (scrollView.frame.size.height - picNumb)/2;
        buttonFrame.size.height = picNumb;
        button.frame = buttonFrame;

        [button setBackgroundImage:[UIImage imageNamed:picString]
                          forState: UIControlStateNormal];
        [button setTitle:nameString
                forState:UIControlStateNormal];

        [scrollView addSubview:button];

        buttonFrame.origin.x += buttonFrame.size.width+xOffset;
        buttonCount++;

    }

    CGSize contentSize = scrollView.frame.size;
    contentSize.width = buttonFrame.origin.x;
    scrollView.contentSize = contentSize;

}

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