自定义 UIButton 从表视图中钻取？

发布于 2024-11-30 19:00:16 字数 894 浏览 1 评论 0原文

我已经放入了一个自定义的“后退”UIBarButtonItem，它来自我在 Photoshop 中制作的图像。我已经设法让它看起来很好，我的问题是让它发挥作用。

我假设我的按钮没有执行任何操作，因为我还没有为其分配任何操作。我只是不知道这样做的正确语法？

这是我的代码

    UIImage *buttonImage = [UIImage imageNamed:@"BackButton.png"];
        UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [backButton setBackgroundImage:buttonImage forState:UIControlStateNormal];
        backButton.frame = CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height);

// Im assuming this is where i need to put the action...
        //[backButton addTarget:self action:@selector(.......) forControlEvents:UIControlEventTouchUpInside];

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] 
                                                 initWithCustomView:backButton];

基本上，我希望我的新自定义后退按钮的功能就像常规 UITableView 中的默认后退按钮一样

，安迪

原文

Ive put in a custom "Back" UIBarButtonItem, which is from an Image i made in photoshop. Ive managed to make it appear just fine, my problem is making it work.

My button does nothing, im assuming because i havent assigned any actions to it. I just dont know the correct syntax to do so?

Heres my code

    UIImage *buttonImage = [UIImage imageNamed:@"BackButton.png"];
        UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [backButton setBackgroundImage:buttonImage forState:UIControlStateNormal];
        backButton.frame = CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height);

// Im assuming this is where i need to put the action...
        //[backButton addTarget:self action:@selector(.......) forControlEvents:UIControlEventTouchUpInside];

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] 
                                                 initWithCustomView:backButton];

Basically, i want my new custom backbutton to function just like the default one in a regular UITableView

regards,
Andyy

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久光 2024-12-07 19:00:16

您可以在 IB 中执行此操作，也可以在代码中调用 addTarget:action:forControlEvents: for UIControlEventTouchUpInside 在按钮按下时调用方法（操作）。被点击。例如：

[backButton addTarget:self action:@selector(backButtonPressed:) forControlEvents:UIControlEventTouchUpInside];

这记录在 UIControl 类参考中，UIButton是UIControl的子类。

您需要一个在事件发生时调用的方法，我在上面的代码中将其称为 backButtonPressed:。该方法采用一个参数，即发送事件的对象，如下所示：

-(void)backButtonPressed:(id)sender
{
    // NOTE: assumes self is your UIViewController
    [self.navigationController popViewControllerAnimated:YES];
}

You can do this in IB or you can do it in code with a call to addTarget:action:forControlEvents: for UIControlEventTouchUpInside to invoke a method (action) when the button is tapped. For example:

[backButton addTarget:self action:@selector(backButtonPressed:) forControlEvents:UIControlEventTouchUpInside];

This is documented in UIControl class reference, UIButton is a subclass of UIControl.

You'll need a method which will be called when the event occurs, which I called backButtonPressed: in my code above. This method takes one parameter, the object sending the event, something like this:

-(void)backButtonPressed:(id)sender
{
    // NOTE: assumes self is your UIViewController
    [self.navigationController popViewControllerAnimated:YES];
}

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