默认的后退按钮文本和字体设置 [英] Default Back Button Text and Font Setting

问题描述

默认情况下，导航后退按钮文本作为上一个屏幕标题或<

By default, Navigation back button text comes as previous screen title or <

我正在尝试将其更改为< = |

I am trying to change that to just <=|

但是它来了，如图所示 BackButton图片. 因此，我想知道如何更改其字体以使< = |变大.并删除默认的<

But Its coming as shown in the picture BackButton Image. So, I want to know how to change its font to make big <=| and remove the default <

我尝试过

在第一个开始屏幕的viewDidLoad中尝试了相同的代码， 所以我也想知道将此代码放在哪里:

Tried the same code in viewDidLoad of first start screen, So i also want to know where to place this code:

override func viewWillAppear(animated: Bool)
{
    self.navigationItem.leftBarButtonItem?.title = "<=|"
    let FntStgVal = [NSFontAttributeName:UIFont.systemFontOfSize(50, weight: UIFontWeightLight)]
    self.navigationItem.leftBarButtonItem?.setTitleTextAttributes(FntStgVal, forState: .Normal)
}

推荐答案

像这样在viewDidLoad中更改代码.

class BaseViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    func setNavigationWithCustomBackButton() {
        let btnLeft:UIButton! = UIButton(frame: CGRectMake(0, 0, 20, 16))
        btnLeft.setTitle("<=|", forState: .Normal)
        btnLeft.titleLabel?.font = UIFont.systemFontOfSize(19, weight: UIFontWeightLight)
        btnLeft!.addTarget(self, action: "handleBack:",forControlEvents: UIControlEvents.TouchUpInside)
        let leftItem:UIBarButtonItem = UIBarButtonItem(customView: btnLeft!)
        self.navigationItem.leftBarButtonItem = leftItem
    }

    func handleBack(sender: UIButton) {
        self.navigationController?.popViewControllerAnimated(true)
    }
}

现在将此BaseViewController用作所有viewController的父级，并像这样在viewDidLoad中调用其方法.

Now use this BaseViewController as parent of your all viewController and call its method in viewDidLoad like this.

class ViewController1: BaseViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.setNavigationWithCustomBackButton()
    }
}

现在它将在NavigationBar中添加自定义后退按钮.
希望对您有帮助.

Now it will add custom back button in your NavigationBar.
Hope this will help you.

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