Question

我有一个UIWebView页面，其中一个UIScrollView位于我的UIScrollView内UIImage和按钮我想从我的xml文件中为每个按钮设置特定的标题，请你给我一些提示来实现它吗？

右边我可以从xml获得第一个名字但是它已经为所有

设置了

我的带有按钮和图像的scrollView：

const NSUInteger kNumImages = 5;



scrollView1.pagingEnabled = YES;

// load all the images 
NSUInteger i;
for (i = 1; i<= kNumImages; i++)
{
    NSString *imageName = [NSString stringWithFormat:@"image%d.jpg", i];

    UIImage *image = [UIImage imageNamed:imageName];
    UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
    imageView.userInteractionEnabled = YES;


    CGRect rect = imageView.frame;
    rect.size.height = kScrollObjHeight;
    rect.size.width = kScrollObjWidth;
    imageView.frame = rect;
    imageView.tag = i;  
    [scrollView1 addSubview:imageView];



UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];

    appDelegate = (testAppDelegate *)[[UIApplication sharedApplication] delegate];
    Presentation1Name *aSlide = [appDelegate.books objectAtIndex:0];
    NSLog(@" %@", aSlide.slideLabel );

    [btn setTitle:[NSString stringWithString:aSlide.slideLabel]  
forState:UIControlStateNormal];
     btn.frame = rect;
     [btn setTag:i];
    [btn addTarget:self action:@selector(buttonClick:)  
  forControlEvents:UIControlEventTouchUpInside];

    [imageView addSubview:btn];



}

[self layoutScrollImages];

}

为所有按钮添加标题我正在使用代码

   [btn setTitle:[NSString stringWithString:aSlide.slideLabel]  
forState:UIControlStateNormal];

但是对于每个按钮，我想要从xml文件中获得特定标题

提前致谢！

这是我的xml文件：

 <Presentation label="presentation1">
<slides>
    <slide index="0" label="slide1" identifier="Slide1Name" />

    <slide index="1" label="something" identifier="Slide2Name" />

</slides>
 </Presentation>

修改：

当我添加Presentation1Name * aSlide = [appDelegate.books objectAtIndex：0]; objectAtIndex to i我将收到此错误

当我添加objectAtIndex时：i 进程终止 *由于未捕获的异常'NSInvalidArgumentException'终止应用程序，原因：' - [NSPlaceholderString initWithString：]：nil参数' * *第一次抛出调用堆栈：（0x1c95012 0x10d2e7e 0x1c94deb 0xae97f5 0xae9774 0x3d64 0x4723 0x10e6705 0x1d920 0x1d8b8 0xde671 0xdebcf 0xddd38 0x4d33f 0x4d552 0x2b3aa 0x1ccf8 0x1bf0df9 0x1bf0ad0 0x1c0abf5 0x1c0a962 0x1c3bbb6 0x1c3af44 0x1c3ae1b 0x1bef7e3 0x1bef668 0x1a65c 0x295d 0x2885为0x1） libc ++ abi.dylib：terminate调用抛出异常（LLDB）

这是因为

- [NSPlaceholderString initWithString：]：nil参数'

之后我改变了5 t0 2，因为我的xml文件中只有2个标签

const NSUInteger kNumImages= 2;

并且还将（i = 1; i＆lt; = kNumImages; i ++）更改为

for (i = 0; i> kNumImages; i++)

但仍“无法正常工作

我的问题是我该怎么做

appDelegate.books count should be equal to kNumImages

Answer 1

[btn setTitle:[NSString stringWithFormat:@"MyButton %d", i] forState:UIControlStateNormal];

Answer 2

将所有按钮名称存储在 NSMutableArray 中，然后再使用

例如：

 NSMutableArray *arrNames = [NSMutableArray alloc]initWithObjects:@"Dog",@"Cat",......,nil]; //fill your array

 [btn setTitle:[arrNames objectAtIndex:i] forState:UIControlStateNormal];

第二种选择是在答案中使用@Andrey Chernukha

UIScrollView中每个按钮的特定标题

2 个答案: