swift-导航栏添加自定义返回按钮

swift-导航栏添加自定义返回按钮

1.添加返回按钮

func addBackBtn(){    
  let leftBtn:UIBarButtonItem=UIBarButtonItem(title: "返回", style: UIBarButtonItemStyle.Plain, target: self, action: "actionBack")    
  leftBtn.title="返回";    
  leftBtn.tintColor=UIColor.whiteColor();   
  self.navigationItem.leftBarButtonItem=leftBtn;  
}  

返回按钮事件

func actionBack(){    
  self.navigationController?.popToRootViewControllerAnimated(true);  
}