如何设置navigationItem titleView的按钮？

Question

I want to programmatically set button for navigationItem.titleView.

I tried with following code but with no success;

UIBarButtonItem *navigationTitleButton = [[UIBarButtonItem alloc] initWithTitle:@"Custom" style:UIBarButtonItemStyleBordered target:self action:@selector(backToHOmePage)];

navigationTitleButton.image = [UIImage imageNamed:@"title.png"];

self.navigationItem.titleView = navigationTitleButton;

Warnng says: Incompatible pointer types assigning to 'UIView *' from 'UIBarButtonItem *__strong'

Answer 1

Try to use this code see if it works for you

UIView * container = [[UIView alloc]initWithFrame:CGRectZero];
UIButton * button = [[UIButton alloc]initWithFrame:CGRectZero];
[button addTarget:self action:@selector(backToHOmePage) forControlEvents:UIControlEventTouchUpInside];
[button setImage:[UIImage imageNamed:@"clanak_default.png"] forState:UIControlStateNormal];
[button sizeToFit];
[container addSubview:button];
[button release];
[container sizeToFit];
self.navigationItem.titleView = container;
[container release];

Answer 2

You dont have to create BarItem, you need to create UIView class object;

ARC

UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
view.backgroundColor = [UIColor clearColor];

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = view.frame;

[view addSubview:button];

self.navigationItem.titleView = view;

or

   UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
   button.frame = CGRectMake(0, 0, 40, 40);
   self.navigationItem.titleView = button;

Answer 3

Swift version:

var button =  UIButton.buttonWithType(UIButtonType.Custom) as UIButton
button.frame = CGRectMake(0, 0, 100, 40) as CGRect
button.backgroundColor = UIColor.redColor()
button.setTitle("Button", forState: UIControlState.Normal)
button.addTarget(self, action: Selector("clickOnButton:"), forControlEvents: UIControlEvents.TouchUpInside)
self.navigationItem.titleView = button

Here you can see in last line button is directly set to the titleView of navigationItem which will add button at the center of navigation bar.

Action method for button is below:

func clickOnButton(button: UIButton) {

}

Answer 4

You can add a UIImageView as the navigationItem's titleView directly, however it will not be visible if you do not make sure it is sized. The easiest way to size it is to use sizeToFit().

In this example I also round the corners and add the ability to know if it is tapped.

override func viewDidLoad() {
    super.viewDidLoad()

    let titleIconButton = UIButton(type: .Custom)
    titleIconButton.setImage(UIImage(named: "login-icon"), forState: .Normal)
    titleIconButton.addTarget(self, action: #selector(titleIconTap), forControlEvents: .TouchUpInside)
    titleIconButton.clipsToBounds = true
    titleIconButton.layer.cornerRadius = 4
    titleIconButton.sizeToFit()
    navigationItem.titleView = titleIconButton
}

Answer 5

Here is a Swift 4 ported version of the answer from @Esqarrouth.

let button = UIButton(type: .custom)
button.frame = CGRect(x: 0, y: 0, width: 100, height: 40)
button.backgroundColor = .red
button.setTitle("Button", for: .normal)
button.addTarget(self, action: #selector(clickedButton(_:)), for: .touchUpInside)
self.navigationItem.titleView = button

Answer 6

Swift 3 Version:

    let logoButton = UIButton(type: .custom)
    logoButton.setImage(#imageLiteral(resourceName: "Logo"), for: .normal)
    logoButton.sizeToFit()
    logoButton.addTarget(self, action: #selector(tapLogo), for: .touchUpInside)

    self.navigationItem.title = ""
    self.navigationItem.titleView = logoButton

Answer 7

If you plan on changing the button.title at runtime, and you change the title to longer text, it will not be centered. And if you do button.sizeToFit(), it will be centered, but show the new title as "T..e".

The solution is to put the UIButton in a UIView. And constrain the button to all sides of UIView. Then just set the navigationItem.titleView to that UIView. And it will handle programmatic title changes perfectly.

Answer 8

Try creating a UIButton object for your button instead of a UIBarButtonItem one. UIButton is a subclass of UIView so you should be able to set the titleView property to the UIButton you've created.

Answer 9

您可以在视图上添加按钮，然后将该视图作为导航栏的标题视图，然后您可以轻松地在运行时更改按钮的标题。

Answer 10

这种基于UISegmentedControl的方法可以帮助您： https ： //stackoverflow.com/a/16792575/171933享受！