如何根据 iphone 中的文本大小动态增加按钮宽度?

问题描述

我以编程方式创建了 10 个按钮并在按钮中设置了标题.现在我想动态增加按钮框架的大小，它取决于文本.

I have created 10 buttons programmatically and set the titles in the button. Now i want to increase the button frame size dynamically,its depends on the text.

我给出了一些条件并设置了帧大小.但是我如何设置确切的帧大小取决于文本(动态获取文本).

I given some conditions and set the frame size. but how can i set the exact frame size depends on the text(get the text dynamically).

这是我的示例代码，

     float x=0, y=0, w, h=20;

    for(int i = 100; i < 110; i++)
     {
         btn = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];

         UIImage * img = [UIImage imageNamed:@"Round_Rect4.png"];

        [btn setBackgroundImage:img forState:UIControlStateSelected];

        titleString = [titleArray objectAtIndex:i-100];  // get button title

        if([titleString length] <= 5)
        {
            w = 50;
            btn.frame = CGRectMake(x,y,w,h); 

            x = x + 70;
        }

        if (([titleString length] >= 6) && ([titleString length] <=10))
       {
             w = 70;

             btn.frame = CGRectMake(x,y,w,h); 

             x = x + 90;
       } 

       if(([titleString length] >= 11) && ([titleString length] <=15))
       {
             w = 105;
             btn.frame = CGRectMake(x,y,w,h); 

             x = x + 120;

       }

       if([titleString length] >= 16)
       {
             w = 120;
             btn.frame = CGRectMake(x,y,w,h); 

             x = x + 140;

       }

        [btn setTitle:titleString forState: UIControlStateNormal];

        [btn setTag:i];

        [self.view addSubview:btn];

}

查看示例图片，

image-2 http://www.freeimagehosting.net/uploads/b6e0f234dc.pngimage-1 http://www.freeimagehosting.net/uploads/6b3daab12f.png

那么这是否可以设置取决于文本的确切按钮框架大小?请指导我.

So is this possible to set the exact button frame size which depends on the text?, plz guide me.

谢谢

推荐答案

我得到了答案，我的工作代码是，

I got the answer and my working code is,

        float x=0;

        for(int i = 100; i < 110; i++)
         {
             btn = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];

             UIImage * img = [UIImage imageNamed:@"Round_Rect4.png"];

            [btn setBackgroundImage:img forState:UIControlStateSelected];

            titleString = [titleArray objectAtIndex:i-100];  // get button title

           CGSize fontSize = [titleString sizeWithFont:[UIFont systemFontOfSize:12.0]];

            CGRect currentFrame = btn.frame;

            CGRect buttonFrame = CGRectMake(x, currentFrame.origin.y, fontSize.width + 22.0, fontSize.height + 12.0);

           [btn setFrame:buttonFrame];

            x = x + fontSize.width + 35.0;

            [btn setTitle:titleString forState: UIControlStateNormal];

            [btn setTag:i];

            [self.view addSubview:btn];

}

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