IOS - uibutton的动态放置
<p><p>我有一个奇怪的问题:</p>
<p>我在 ViewDidLoad 或 ViewDidAppear 中动态设置一些按钮位置(都尝试过)并手动设置尺寸。然后，每当按下按钮时，我都会更改按钮的框架。但即使我设置了原始的 - 它们在屏幕上的位置不同，但它们看起来有点“向下移动了一些 px”。我附上代码和截图:</p>
<p>viewDidAppear :</p>
<pre><code> self.twoTeamsBtn = [ init];
self.twoTeamsBtn.frame = CGRectMake(156/2, (94/2), selected2Image.size.width, selected2Image.size.height);
self.threeTeamsBtn = [ init];
self.threeTeamsBtn.frame = CGRectMake(331/2, (132/2), unselected3Image.size.width, unselected3Image.size.height);
self.fourTeamsBtn = [ init];
self.fourTeamsBtn.frame = CGRectMake(505/2, (132/2), unselected4Image.size.width, unselected4Image.size.height);
</code></pre>
<p>所以，twoTeams 的赔率为 94/2 (Y)，而你的赔率为 132/2。两个图像的高度相同。
(selected2和selected3一样，unselected3和unselected3一样，以此类推)。</p>
<p>然后在我的点击方法中我有:</p>
<pre><code> if (button.tag == self.twoTeamsBtn.tag) {
self.threeTeamsBtn.frame = CGRectMake(331/2, (132/2), self.threeTeamsBtn.frame.size.width, self.threeTeamsBtn.frame.size.height);
self.fourTeamsBtn.frame = CGRectMake(505/2, (132/2), self.fourTeamsBtn.frame.size.width, self.fourTeamsBtn.frame.size.height);
self.twoTeamsBtn.frame = CGRectMake(156/2, (94/2), selected2Image.size.width, selected2Image.size.height);
;
;
;
} else if (button.tag == self.threeTeamsBtn.tag) {
self.threeTeamsBtn.frame = CGRectMake(331/2, (94/2), selected3Image.size.width, selected3Image.size.height);
self.fourTeamsBtn.frame = CGRectMake(505/2, (132/2), self.fourTeamsBtn.frame.size.width, self.fourTeamsBtn.frame.size.height);
self.twoTeamsBtn.frame = CGRectMake(156/2, (132/2), self.twoTeamsBtn.frame.size.width, self.twoTeamsBtn.frame.size.height);
;
;
;
} else if (button.tag == self.fourTeamsBtn.tag) {
self.threeTeamsBtn.frame = CGRectMake(331/2, (132/2), self.threeTeamsBtn.frame.size.width, self.threeTeamsBtn.frame.size.height);
self.fourTeamsBtn.frame = CGRectMake(505/2, (94/2), selected4Image.size.width, selected4Image.size.height);
self.twoTeamsBtn.frame = CGRectMake(156/2, (132/2), self.twoTeamsBtn.frame.size.width, self.twoTeamsBtn.frame.size.height);
;
;
;
}
</code></pre>
<p>截图如下:</p>
<p> <a href="/image/Bx3tt.jpg" rel="noreferrer noopener nofollow"><img src="/image/Bx3tt.jpg" alt="button 2 selected"/></a>
<a href="/image/ZWgk9.jpg" rel="noreferrer noopener nofollow"><img src="/image/ZWgk9.jpg" alt="button 3 selected"/></a>
<a href="/image/p2HsG.jpg" rel="noreferrer noopener nofollow"><img src="/image/p2HsG.jpg" alt="button 3 selected"/></a> </p>
<p>因此，如果您在第二张图片中看到，按钮 2 和按钮 4 不在同一级别，尽管它们的框架是相同的。在第三个中，2 和 3 处于同一水平。</p>
<p><strong>比如原来的132/2，和后面的不一样。</strong></p>
<p>我错过了什么吗？</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>感谢 TwoStraws，您可能已经找到了答案，但我认为问题在于您设置框架宽度/高度的方式</p>
<pre><code>if (button.tag == self.twoTeamsBtn.tag) {
self.threeTeamsBtn.frame = CGRectMake(331/2, (132/2), self.threeTeamsBtn.frame.size.width, self.threeTeamsBtn.frame.size.height);
self.fourTeamsBtn.frame = CGRectMake(505/2, (132/2),self.fourTeamsBtn.frame.size.width, self.fourTeamsBtn.frame.size.height);
self.twoTeamsBtn.frame = CGRectMake(156/2, (94/2), selected2Image.size.width, selected2Image.size.height);
;
;
;
}
</code></pre>
<p>对于未选择的图像，您将框架设置为之前的任何图像，但如果选择/未选择的图像大小不同，则最后一个选择的图像(现在未选择的图像将关闭)。您需要根据您使用的图像设置帧大小。</p>
<p>即</p>
<pre><code>if (button.tag == self.twoTeamsBtn.tag) {
self.threeTeamsBtn.frame = CGRectMake(331/2, (132/2), unselected3Image.size.width, unselected3Image.size.height);
self.fourTeamsBtn.frame = CGRectMake(505/2, (132/2),unselected4Image.size.width, unselected4Image.size.height);
self.twoTeamsBtn.frame = CGRectMake(156/2, (94/2), selected2Image.size.width, selected2Image.size.height);
;
;
;
}
</code></pre></p>
<p style="font-size: 20px;">关于IOS - uibutton的动态放置，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/34369917/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/34369917/
</a>
</p>
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