如何从自定义 UITabBar 启动模式视图？

发布于 2024-12-02 04:25:50 字数 307 浏览 3 评论 0原文

我已经从这个 GitHub 位置构建了中心凸起的 UITabBar。

我现在的挑战是我不知道如何创建按下按钮时出现的模式视图。

有人幸运地使用过 idev-recipes RaisingCenterTabBar 吗？您是如何实现那里出现的模式表的？

或者，是否有另一个 gitHub 项目有一个带有模式表的工作自定义选项卡栏？

谢谢你！

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書生途 2024-12-09 04:25:50

这是我的解决方案，这是迄今为止我发现的最干净的方法...我真的希望它有所帮助，我花了几个小时研究最好的方法。

我设置了一个“UITabBarController”委托，它直接连接到我的故事板上构建的选项卡界面。

** 不要忘记在头文件中包含“tabBarController”委托

** 请注意，此回调方法不是“didSelectViewController”，而是“shouldSelectViewController”。此方法在选择选项卡之前处理请求，这正是您想要的，因此您可以在请求发生之前停止请求...这样您就不必保存当前所在的索引，将其传递并所有这些废话。

然后我只是检查将选择哪个选项卡（基于视图控制器的标题。

**另外：这是我的代码，根据您的代码需要更改它。但原则应该保留。我的“performSegueWithIdentifier”实际上是一个手动segue连接到以模式打开的选项卡控制器。这段代码对我来说非常有用。

 -(BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController{

     if([[viewController title] isEqualToString:@"tellvc"])
     {
         [self performSegueWithIdentifier:@"shareModelViewController" sender:Nil];
         return NO;
     }
     else
     {
         return YES;
     }

 }

Here was my solution, it was BY FAR the cleanest way I found to do this... I really hope it helps, I spent hours researching the best ways.

I setup a "UITabBarController" delegate that connects directly to my tab interface built out on my storyboard.

** Don't forget to include the "tabBarController" delegate in your header file

** Notice this callback method is NOT the "didSelectViewController" but rather the "shouldSelectViewController". This method handles the request before the tab is selected and that is exactly what you want so you can STOP the request before it ever happens... This way you don't have to save the current index you are on, pass it around and all that nonsense.

Then I am simply checking what tab WILL be selected (based on the view controller's title.

** Also: this is my code, change it as needed for your code. But the principals should remain. My "performSegueWithIdentifier" is actually a manual segue connected to my tab controller that opens in a modal. This code is working brilliant for me.

 -(BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController{

     if([[viewController title] isEqualToString:@"tellvc"])
     {
         [self performSegueWithIdentifier:@"shareModelViewController" sender:Nil];
         return NO;
     }
     else
     {
         return YES;
     }

 }

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揽清风入怀 2024-12-09 04:25:50

我正在开发的一个程序中有类似的东西，很高兴向您展示我是如何做到的。我在 TabBar 中有几个 viewController。我在我决定首先出现在 ViewDidLoad 屏幕上的任何 VC 中创建我的加号按钮。

    // Create a plus button that appears on the tabBar
UIImage *plusButton = [UIImage imageNamed:@"plusbutton.png"];
UIView *tabBarView = [[self tabBarController] view];
addButton = [UIButton buttonWithType:UIButtonTypeCustom];
[addButton setFrame:CGRectMake(127.0, 432.0, [plusButton size].width, [plusButton size].height)];
[addButton setBackgroundImage:plusButton forState:UIControlStateNormal];
[tabBarView addSubview:addButton];
[addButton addTarget:self action:@selector(scalePicker:) forControlEvents:UIControlEventTouchUpInside];

我使按钮成为 tabBarController 视图的子视图。后来在这个 VC 的实现中，我有一个名为 scalePicker 的方法：它创建我的其他 VC 之一的实例并以模态方式呈现它。这是代码：（注意：这是我在上面的代码中设置为加号按钮目标的方法）

    -(void) scalePicker:(id)sender
{
    // create the view scalePicker, set it's title and place it on the top of the view hierarchy
sp = [[ScalePickerVC alloc] init];
[self presentModalViewController:pickerNavController animated:YES];
}

我希望这对您有帮助，
祝你好运！

I have something similar in a program of mine that I'm working on and would be glad to show you how I do it. I have a couple of viewControllers in a TabBar. I create my Plus button in whichever VC I decide will appear first on the screen in ViewDidLoad.

    // Create a plus button that appears on the tabBar
UIImage *plusButton = [UIImage imageNamed:@"plusbutton.png"];
UIView *tabBarView = [[self tabBarController] view];
addButton = [UIButton buttonWithType:UIButtonTypeCustom];
[addButton setFrame:CGRectMake(127.0, 432.0, [plusButton size].width, [plusButton size].height)];
[addButton setBackgroundImage:plusButton forState:UIControlStateNormal];
[tabBarView addSubview:addButton];
[addButton addTarget:self action:@selector(scalePicker:) forControlEvents:UIControlEventTouchUpInside];

I make the button a subView of the tabBarController's view. Later on in the implementation of this VC I have a method called scalePicker: which creates and instance of one of my other VC's and presents it modally. Here is the code for that: (note: this is the method that I set as a target for the plus button in the code above)

    -(void) scalePicker:(id)sender
{
    // create the view scalePicker, set it's title and place it on the top of the view hierarchy
sp = [[ScalePickerVC alloc] init];
[self presentModalViewController:pickerNavController animated:YES];
}

I hope this helps you,
Good Luck!

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