ios - UIBarButtonItem - 如何弹出 "done"按钮？

Question

我有一个带有“完成”按钮的导航 Controller 。当用户完成表单时，他们按“完成”，我希望该 View 从堆栈中弹出并返回主菜单。

这是我目前得到的代码:

UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" 
                                                                  style:UIBarButtonItemStylePlain 
                                                                 target:self 
                                                                 action:[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:1] animated:YES]];          
self.navigationItem.rightBarButtonItem = anotherButton;

求助!谢谢

Answer 1

你试试这个怎么样:

UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" 
                                                               style:UIBarButtonItemStylePlain 
                                                                 target:self 
                                                                 action:@selector(onClickOfDone);          
self.navigationItem.rightBarButtonItem = anotherButton;

现在在名为onClickOfDone的方法中编写popViewController逻辑

- (void)onClickOfDone {
[self.navigationController popViewControllerAnimated:YES];
}

如果您的 pop 仅返回一级，那么上面的代码会有所帮助。如果你想指定它必须弹出到的 Controller ，那么你可以使用

[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:1] animated:YES]

编辑:

您还可以使用 SystemItem 完成:

UIBarButtonItem *aDoneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone 
                                                                             target:self action:@selector(onClickOfDone)];
self.navigationItem.rightBarButtonItem = aDoneButton;
[aDoneButton release];