UIToolBar选中按钮状态

发布于 2024-10-24 01:35:15 字数 823 浏览 4 评论 0原文

我有一个 UItableView，底部有一个工具栏。工具栏有两个按钮，分别是“水果”和“蔬菜”。单击它们将仅显示相应的类别。

我已经设法使显示功能正常工作，但我不知道如何在选择时将按钮设置为 selectedState 。

我创建了如下所示的工具栏

UIBarButtonItem *fruits = [[UIBarButtonItem alloc] initWithTitle:@"Fruits" style:UIBarButtonItemStyleBordered target:self action:@selector(fruitsClicked:)];
UIBarButtonItem *vegetables = [[UIBarButtonItem alloc] initWithTitle:@"Vegetables" style:UIBarButtonItemStyleBordered target:self action:@selector(vegetablesClicked:)];
NSArray *items = [NSArray arrayWithObjects: fruits,vegetables,nil];
[fruits release];
[vegetables release];
[self setToolBarItems:items];

和选择器，

-(void)fruitsClicked:(id)sender{
     //code here
}

因为我之前释放了按钮，所以我无法设置

fruits.enabled=NO;

任何帮助，我们将不胜感激。

原文

I have a UItableView with a toolbar in the bottom. The toolbar has two buttons say 'fruits','vegetables'. Clicking on them will display only the corresponding category.

I have managed to get the displaying feature working, but i do not know how to set the button in selectedState when chosen.

I created the toolbar as shown below

UIBarButtonItem *fruits = [[UIBarButtonItem alloc] initWithTitle:@"Fruits" style:UIBarButtonItemStyleBordered target:self action:@selector(fruitsClicked:)];
UIBarButtonItem *vegetables = [[UIBarButtonItem alloc] initWithTitle:@"Vegetables" style:UIBarButtonItemStyleBordered target:self action:@selector(vegetablesClicked:)];
NSArray *items = [NSArray arrayWithObjects: fruits,vegetables,nil];
[fruits release];
[vegetables release];
[self setToolBarItems:items];

and selectors like

-(void)fruitsClicked:(id)sender{
     //code here
}

Since i release the buttons earlier, i am not able to set

fruits.enabled=NO;

ANy help would be appreciated.

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猫七 2024-10-31 01:35:15

我认为添加单独的按钮来做到这一点并不是一个好的设计和策略，您应该使用 UISegmentad 控件，它是您想要的组件设计：在 X 中选择一个段。

您可以像这样使用它（选择第一个） item 例如）：

UISegmentedControl *segment = [[UISegmentedControl alloc] initWithItems:array];
[segment setSelectedSegmentIndex:0];

并获取所选项目：

segment.selectedSegmentIndex

I think adding separate Buttons to do that is not a good design and strategy, you should use a UISegmentad control which is a component design for what you want: have one segment selected among X.

You can use it like this (to select the first item for example):

UISegmentedControl *segment = [[UISegmentedControl alloc] initWithItems:array];
[segment setSelectedSegmentIndex:0];

And to get the selected item:

segment.selectedSegmentIndex

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情场扛把子 2024-10-31 01:35:15

传递给 FruitClicked 处理程序的 sender 参数将是指向 UIBarButtonItem 的指针。您可以像这样投射它：

[((UIBarButtonItem*)sender) setEnabled:NO];

但是，一旦按钮被禁用，它就不再接受点击（即您无法再次点击它来重新启用它）。我会为按钮使用 customView 并自己实现启用/禁用外观。

The sender argument passed to your fruitClicked handler will be a pointer to the UIBarButtonItem. You can cast it like this:

[((UIBarButtonItem*)sender) setEnabled:NO];

However, once the button is disable it no longer accepts taps (i.e. you couldn't tap it again to re-enable it). I would use a customView for the button and implement the enabled/disable appearance yourself.

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