iPhone开发--返回UINavigationController的根视图

首先自定义UINavigationBar的左侧返回按钮

[cpp] UIButton * backBtn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0,71.5, 44)]; 
//    UIButton * backBtn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0,200, 44)];  
 
[backBtn setImage:[UIImage imageNamed:@"bt_fanhui.png"] forState:UIControlStateNormal] ; 
[backBtn setImage:[UIImage imageNamed:@"bt_fanhui_over.png"] forState:UIControlStateHighlighted] ; 
//    backBtn.backgroundColor = [UIColor redColor];  
[backBtn addTarget:self action:@selector(backButtonClick:) forControlEvents:UIControlEventTouchUpInside] ; 
[backBtn setShowsTouchWhenHighlighted:YES] ; 
 
UIBarButtonItem *backbutton = [[UIBarButtonItem alloc]initWithCustomView:backBtn]; 
self.navigationItem.leftBarButtonItem = backbutton; 
[backBtn release] ; 
 UIButton * backBtn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0,71.5, 44)];
 //    UIButton * backBtn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0,200, 44)];
 
 [backBtn setImage:[UIImage imageNamed:@"bt_fanhui.png"] forState:UIControlStateNormal] ;
 [backBtn setImage:[UIImage imageNamed:@"bt_fanhui_over.png"] forState:UIControlStateHighlighted] ;
 //    backBtn.backgroundColor = [UIColor redColor];
 [backBtn addTarget:self action:@selector(backButtonClick:) forControlEvents:UIControlEventTouchUpInside] ;
 [backBtn setShowsTouchWhenHighlighted:YES] ;
 
 UIBarButtonItem *backbutton = [[UIBarButtonItem alloc]initWithCustomView:backBtn];
 self.navigationItem.leftBarButtonItem = backbutton;
 [backBtn release] ;

编写点击返回按钮所触发的函数

[cpp] - (void)backButtonClick:(id)sender 
{ 
    [self.navigationController popToRootViewControllerAnimated:YES]; 
} 

摘自 zcl369369的专栏