如何将图像设置的UINavigationController的后退按钮

Question

我想要的图像设置为UINavigationController的

Answer 1

的后退按钮只需调用导航控制器上popViewControllerAnimated，它会回去。

Answer 2

您不能更改默认后退按钮，因为它不会让您覆盖它。相反，您必须使用leftBarButtonItem来创建自定义“后退”按钮。

点击此处了解详情：http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UINavigationController_Class/Reference/Reference.html#//apple_ref/doc/uid/TP40006934-CH3-SW25

一些现有的代码来引用：UINavigation controller button like backButton

Answer 3

使用此代码：

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; 
button.frame = CGRectMake(0,0,36,30); 
[button setBackgroundImage:[UIImage imageNamed:@"backgroundImage.png"] forState:UIControlStateNormal]; 

[button addTarget:self.navigationController action:@selector(popViewControllerAnimated:) forControlEvents:UIControlEventTouchUpInside]; 
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button]; 
[self.navigationItem setLeftBarButtonItem:barButtonItem]; 

或者使用这个库。非常容易和好看的结果。

https://github.com/boctor/idev-recipes/tree/master/CustomBackButton