ios - 添加自定义按钮后，将后退按钮添加回 navigationController

Question

我正在尝试实现一个包含 uitableview 的 navigationcontroller 。该表格 View 应该是可编辑的，并且要向表格添加行，用户应该按屏幕顶部栏上的加号按钮。但是，当我添加 uibarbuttonitem 并将其设置到左侧时，后退按钮不会重新出现？我该如何让它重新出现？

编辑按钮:

UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:@selector(editButtonPressed)];
[[self navigationItem] setRightBarButtonItem:button];

editButtonPressed 方法:

[_actionList setEditing:TRUE];
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addAction)];
[[self navigationItem] setLeftBarButtonItem:addButton animated:TRUE];
editButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(editButtonDone)];
[[self navigationItem] setRightBarButtonItem:editButton animated:TRUE];
[self disableButtons];

editButtonDone 方法:

[_actionList setEditing:FALSE];
editButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:@selector(editButtonPressed)];
[[self navigationItem] setRightBarButtonItem:editButton];
[self enableButtons];

我是一个初学者，如果这很愚蠢，我很抱歉。

Answer 1

当您离开编辑模式时，请尝试重置左栏按钮。

[[self navigationItem] setLeftBarButtonItem:nil animated:YES];