以编程方式使后退按钮转到上一个视图

Posted 2023-03-22

【中文标题】以编程方式使后退按钮转到上一个视图

【英文标题】：Make back button go to the previous view programmatically

【发布时间】：2014-02-19 01:58:33

【问题描述】：

我有一个 UIBarButtonItem，并希望以编程方式设置转到前一个控制器的操作（在我的例子中，我以前的视图是一个 UITableViewController）。

下面是我目前用来制作条形按钮项的代码，尽管按钮还没有转到上一个视图。

UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
                                                                style:UIBarButtonItemStyleDone target:nil action:nil];
UINavigationItem *item = [[UINavigationItem alloc] initWithTitle:@"Website"];
item.leftBarButtonItem = leftButton;
item.hidesBackButton = YES;
[myBar pushNavigationItem:item animated:NO];

【问题讨论】：

你的行在哪里显示选择器？

UINavigationBar *myBar = [[UINavigationBar alloc]initWithFrame:CGRectMake(0, 0, 320, 64)]; [self.view addSubview:myBar]; UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:nil action:nil]; [leftButton addTarget:self action:@selector(method)

【参考方案1】：

在您的控制器中，- (void)viewDidLoad 函数中添加以下代码：

如果您想自定义带有标题的后退按钮，请致电 [self addBackButtonWithTitle:@"back"];。

或[self addBackButtonWithImageName:@"back_button_image_name"];，如果您想要自定义后退按钮和图像。

/**
 *  @brief set lef bar button with custom title
 */
- (void)addBackButtonWithTitle:(NSString *)title 
    UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:title style:UIBarButtonItemStylePlain target:self action:@selector(backButtonPressed:)];
    self.navigationItem.leftBarButtonItem = backButton;


/**
 *  @brief set left bar button with custom image (or custom view)
 */
- (void)addBackButtonWithImageName:(NSString *)imageName 
    // init your custom button, or your custom view
    UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
    backButton.frame = CGRectMake(0, 0, 40, 22); // custom frame
    [backButton setImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
    [backButton addTarget:self action:@selector(backButtonPressed:) forControlEvents:UIControlEventTouchUpInside];

    // set left barButtonItem with custom view
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];


- (void)backButtonPressed:(id)sender 
    [self.navigationController popViewControllerAnimated:YES];

【参考方案2】：

你可以在你的 viewDidLoad 方法中写这个：

UIBarButtonItem *btn=[[UIBarButtonItem alloc] initWithTitle:@"Back"     style:UIBarButtonItemStyleBordered target:self action:@selector(btnClick)];
self.navigationItem.leftBarButtonItem=btn;

然后使用这个：

// call of method
-(void)btnClick

    [self.navigationController popViewControllerAnimated:YES];

【参考方案3】：

[selfdismissViewControllerAnimated:YES 完成:nil];