带图像的自定义后退按钮

问题描述

我想做的是改变后退按钮的高度.但是，据我了解，唯一可以更改的选项是宽度.所以，我想我会用我自己的、更小的图像创建一个自定义的后退按钮.现在我使用 viewDidLoad 方法和下面的代码完成了这项工作:

What I'd like to do is alter the height of the back button. However, as I understand it, the only option to alter is width. So, I thought I'd create a custom back button with my own, smaller, image. Now I've done this using the viewDidLoad method with the code below:

//Setup navigation bar
        navigationController?.navigationItem.backBarButtonItem = UIBarButtonItem(image:UIImage(named:"back_arrow.png"), style:UIBarButtonItemStyle.Plain, target:nil, action:nil)
        navigationController?.navigationItem.backBarButtonItem!.title = ""

但是，后退按钮仍然是蓝色的、较大的，并且标题为后退".我怎样才能让这段代码正常工作?调试器说它正在运行，但它没有改变任何东西.

However, the back button remains blue, large, and has the title 'Back'. How can I get this code to work properly? The debugger says it is running, but it is not changing anything.

推荐答案

颜色需要设置navBar的tint颜色，也可以设置navigationItem.backBarButtonItem为nil 并将 leftbarButtonItem 与自定义按钮图像一起使用.

For color you have to set the tint color on navBar, also you can set navigationItem.backBarButtonItem to nil and use leftbarButtonItem with custom button image.

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