IOS - uibutton的动态放置

Question

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。但即使当我设置原始的时 - 它们在屏幕上的位置并不相同，但它们看起来有点“向下移动了一些像素”。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);

因此，twoTeams 的赔率为 94/2 (Y)，而 e 的赔率为 132/2。两个图像的高度相同。 (selected2 与 selected3 相同，unselected3 与 unselected3 相同，依此类推)。

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 并不在同一级别，尽管它们的框架相同。在第三个中，2 和 3 处于同一水平。

就像原来的132/2，和后来的不一样。

我错过了什么吗？

Answer 1

我很高兴您可能已经通过 TwoStraws 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，您可以将框架设置为之前的值，但如果所选/未选择的图像尺寸不同，则最后选择的图像(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];
}