IOS - uibutton的动态放置

我有一个奇怪的问题:

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:

viewDidAppear :

    self.twoTeamsBtn = [[UIButton alloc] init];
    self.twoTeamsBtn.frame = CGRectMake(156/2, (94/2), selected2Image.size.width, selected2Image.size.height);
    self.threeTeamsBtn = [[UIButton alloc] init];
    self.threeTeamsBtn.frame = CGRectMake(331/2, (132/2), unselected3Image.size.width, unselected3Image.size.height);
    self.fourTeamsBtn = [[UIButton alloc] init];
    self.fourTeamsBtn.frame = CGRectMake(505/2, (132/2), unselected4Image.size.width, unselected4Image.size.height);

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)。

然后在我的点击方法中我有:

 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);

    [self.threeTeamsBtn setImage:unselected3Image forState:UIControlStateNormal];
    [self.twoTeamsBtn setImage:selected2Image forState:UIControlStateNormal];
    [self.fourTeamsBtn setImage:unselected4Image forState:UIControlStateNormal];

} 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);

    [self.threeTeamsBtn setImage:selected3Image forState:UIControlStateNormal];
    [self.twoTeamsBtn setImage:unselected2Image forState:UIControlStateNormal];
    [self.fourTeamsBtn setImage:unselected4Image forState:UIControlStateNormal];

} 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);

    [self.threeTeamsBtn setImage:unselected3Image forState:UIControlStateNormal];
    [self.twoTeamsBtn setImage:unselected2Image forState:UIControlStateNormal];
    [self.fourTeamsBtn setImage:selected4Image forState:UIControlStateNormal];

}

截图如下:

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。

比如原来的132/2，和后面的不一样。

我错过了什么吗？

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Best Answer-推荐答案

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

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);

    [self.threeTeamsBtn setImage:unselected3Image forState:UIControlStateNormal];
    [self.twoTeamsBtn setImage:selected2Image forState:UIControlStateNormal];
    [self.fourTeamsBtn setImage:unselected4Image forState:UIControlStateNormal];
} 

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。

即

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);

    [self.threeTeamsBtn setImage:unselected3Image forState:UIControlStateNormal];
    [self.twoTeamsBtn setImage:selected2Image forState:UIControlStateNormal];
    [self.fourTeamsBtn setImage:unselected4Image forState:UIControlStateNormal];
} 

关于IOS - uibutton的动态放置，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34369917/