在iOS中显示额外的UINavigationBar？

Question

我对UINavigationBar有一个问题，当我在那里添加UIButton时，当我运行应用程序时，我可以在我的UINavigationBar上看到一个额外的UINaviagtionBar覆盖。

请帮忙

结构就像

UITabbarController - ＆gt; UINavigationController - ＆gt; UIViewController

我附上了截屏链接

运行时间 [！[[1]] [1]] [1]

Xcode

[navigationcontroller-＆gt; viewcontroller屏幕] [3]

代码

ViewDidAppear（）

UIImage *myImage = [UIImage imageNamed:@"filter.png"];
UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom];
[myButton setImage:myImage forState:UIControlStateNormal];
myButton.showsTouchWhenHighlighted = YES;
myButton.frame = CGRectMake(0.0, 0.0,25,25);
[myButton addTarget:self action:@selector(refreshSection) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithCustomView:myButton];
self.navigationItem.leftBarButtonItem = rightButton;

UIImage *myImage1 = [UIImage imageNamed:@"Contacts.png"];
UIButton *myButton1 = [UIButton buttonWithType:UIButtonTypeCustom];
[myButton1 setImage:myImage1 forState:UIControlStateNormal];
myButton1.showsTouchWhenHighlighted = YES;
myButton1.frame = CGRectMake(0.0, 0.0,30,30);

[myButton1 addTarget:self action:@selector(profile) forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *rightButton1 = [[UIBarButtonItem alloc] initWithCustomView:myButton1];
[self.navigationItem setRightBarButtonItems:[NSArray arrayWithObjects:rightButton1, nil]];

full screen storyboard

Answer 1

我认为代码是正确的，只需设置contentMode属性即可。

[[myButton imageView] setContentMode：UIViewContentModeScaleAspectFit];

其他按钮相同。

Answer 2

转到根导航控制器，选择导航栏并在“属性”检查器下，确保您拥有：

1. 默认样式
2. 启用半透明选项，
3. 默认栏色调。