IOS 11和xcode 9中的导航栏barbuttonitem错误框架

Question

我有一个 Viewcontroller，我在其中设置了三个社交媒体右导航栏按钮。以前我在 Xcode 8 中运行应用程序。但是现在当我将 Xcode 更新到 9.1 时，UI 受到了干扰。 Navbar 改变了它的宽度，现在分布在整个 Navbar 中。代码设置为宽度，但未按代码运行。我的代码是这样的，

UIImage* image1 = [UIImage imageNamed:@"fab.png"];
CGRect frameimg1 = CGRectMake(3,0,30,30);
UIButton *someButton1 = [[UIButton alloc] initWithFrame:frameimg1];
[someButton1 setBackgroundImage:image1 forState:UIControlStateNormal];
[someButton1 addTarget:self action:@selector(facebook)
     forControlEvents:UIControlEventTouchUpInside];
[someButton1 setShowsTouchWhenHighlighted:YES];

UIBarButtonItem *mailbutton1 =[[UIBarButtonItem alloc] initWithCustomView:someButton1];

UIImage* image2 = [UIImage imageNamed:@"tt.png"];
CGRect frameimg2 = CGRectMake(20,50,30,30);
UIButton *someButton2 = [[UIButton alloc] initWithFrame:frameimg2];
[someButton2 setBackgroundImage:image2 forState:UIControlStateNormal];
[someButton2 addTarget:self action:@selector(twitter)
     forControlEvents:UIControlEventTouchUpInside];
[someButton2 setShowsTouchWhenHighlighted:YES];

UIBarButtonItem *mailbutton2 =[[UIBarButtonItem alloc] initWithCustomView:someButton2];

    UIImage *image3 = [UIImage imageNamed:@"G+.png"];
CGRect frameimg3 = CGRectMake(0,30,30,30);
UIButton *someButton3 = [[UIButton alloc] initWithFrame:frameimg3];
[someButton3 setBackgroundImage:image3 forState:UIControlStateNormal];
[someButton3 addTarget:self action:@selector(gmail)
     forControlEvents:UIControlEventTouchUpInside];
[someButton3 setShowsTouchWhenHighlighted:YES];

UIBarButtonItem *mailbutton3 =[[UIBarButtonItem alloc] initWithCustomView:someButton3];


[self.navigationItem setRightBarButtonItems:[NSArray arrayWithObjects:mailbutton1,mailbutton2,mailbutton3, nil]];

现在，当我在 Xcode 9.1 中运行该应用程序时，它会显示我的导航栏按钮，如下所示，

Answer 1

我认为ios 11 barbuttonitems 不适用于框架。你必须设置必要的约束。这里你的按钮宽度不合适，所以一旦尝试设置宽度，

[[someButton1.widthAnchor constraintEqualToConstant:30.0] setActive:YES];
[[someButton2.widthAnchor constraintEqualToConstant:30.0] setActive:YES];
[[someButton3.widthAnchor constraintEqualToConstant:30.0] setActive:YES];

为每个按钮设置宽度常量！

这样做后，如果您遇到身高问题，请为 heightAnchor 做同样的事情。

发生这种情况是因为您的图像必须大于按钮的大小，并且您没有对高度和宽度进行限制，因此您的按钮正在调整大小以调整图像大小！