在没有导航控制器的情况下向视图添加导航栏

Question

我有一个侧面菜单滑出来显示一个表视图,从那里我有segues使用显示视图控制器.segue必须直接连接到视图控制器; 我不能使用导航控制器.

如何在没有导航控制器的情况下添加带有条形按钮项的导航栏？

Answer 1

虽然有几种聪明的方法可以回答你的问题.我刚刚以编程方式解决了它并在我的代码中编写了以下代码viewWillAppear(注意 - viewDidLoad也没关系,但不建议) -

-(void) viewWillAppear:(BOOL)animated {

    UINavigationBar *myNav = [[UINavigationBar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
    [UINavigationBar appearance].barTintColor = [UIColor lightGrayColor];
    [self.view addSubview:myNav];


    UIBarButtonItem *cancelItem = [[UIBarButtonItem alloc] initWithTitle:@"Cancel"
                                                                   style:UIBarButtonItemStyleBordered
                                                                  target:self
                                                                  action:nil];

    UIBarButtonItem *doneItem = [[UIBarButtonItem alloc] initWithTitle:@"Done"
                                                                 style:UIBarButtonItemStyleBordered
                                                                target:self action:nil];


    UINavigationItem *navigItem = [[UINavigationItem alloc] initWithTitle:@"Navigation Title"];
    navigItem.rightBarButtonItem = doneItem;
    navigItem.leftBarButtonItem = cancelItem;
    myNav.items = [NSArray arrayWithObjects: navigItem,nil];

    [UIBarButtonItem appearance].tintColor = [UIColor blueColor];
}

因此,您有一个带有蓝色条形按钮项目的白色导航栏,没有导航控制器.同样,在您的情况下还有其他方法可以实现它.希望,这很有帮助.

输出 -

更新 -

要添加图片 -

UIImageView *myImage = [[UIImageView alloc] initWithFrame:CGRectMake(0,10,32,32)];
[myImage setImage:[UIImage imageNamed:@"image.png"]];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:myImage];
[self.view addSubview:myImage];

Answer 2

斯威夫特 4 版本

 let navigationBar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: 320, height: 50))
    navigationBar.barTintColor = UIColor.lightGray
    view.addSubview(navigationBar)

    let cancelButton = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: nil)
    let doneButton = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: nil)

    let navigationItem = UINavigationItem(title: "Title")
    navigationItem.leftBarButtonItem = cancelButton
    navigationItem.rightBarButtonItem = doneButton

    navigationBar.items = [navigationItem]

Answer 3

有一种方法可以使用NavigationItemin interface builder.

首先添加NavigationItem到您ViewController在界面生成器,就像你使用一个NavigationController.请务必使NavigationBar是选择与其它有形的东西Inferred,并None在模拟的指标.

其次,在viewDidLoad,只需添加以下行:

- (void)viewDidLoad 
{
    [super viewDidLoad];

    UINavigationBar *bar = [[UINavigationBar alloc] initWithFrame: frame];
    bar.items = @[self.navigationItem];
    [self.view addSubview: bar];
}

至于frame,width将是一样的ViewController,并height会要么44.0还是64.0取决于如果status bar是可见或不可见.

CGFloat navigationBarHeight = 44.f + [UIApplication sharedApplication].statusBarFrame.size.height;
CGRect frame = CGRectMake(0, 0, self.view.frame.size.width, navigationBarHeight);

如果您希望支持不同的方向,请使用NSLayoutConstraints:

    CGFloat navigationBarHeight = 44.f + [UIApplication sharedApplication].statusBarFrame.size.height;
[self.view addConstraints: @[
    [NSLayoutConstraint constraintWithItem: self.view
                                 attribute: NSLayoutAttributeLeft
                                 relatedBy: NSLayoutRelationEqual
                                    toItem: bar
                                 attribute: NSLayoutAttributeLeft
                                multiplier: 1.0
                                  constant: 0.0],
    [NSLayoutConstraint constraintWithItem: self.view
                                 attribute: NSLayoutAttributeRight
                                 relatedBy: NSLayoutRelationEqual
                                    toItem: bar
                                 attribute: NSLayoutAttributeRight
                                multiplier: 1.0
                                  constant: 0.0],
    [NSLayoutConstraint constraintWithItem: self.view
                                 attribute: NSLayoutAttributeTop
                                 relatedBy: NSLayoutRelationEqual
                                    toItem: bar
                                 attribute: NSLayoutAttributeTop
                                multiplier: 1.0
                                  constant: 0.0],
    [NSLayoutConstraint constraintWithItem: bar
                                 attribute: NSLayoutAttributeHeight
                                 relatedBy: NSLayoutRelationEqual
                                    toItem: nil
                                 attribute: NSLayoutAttributeNotAnAttribute
                                multiplier: 1.0
                                  constant: navigationBarHeight],
                             ]];