Question

我正在构建一个iPad应用程序，我希望在用户按下按钮（常规按钮，而不是ToolBarItem）时弹出uipickerview。我意识到通常你会从工具栏中输入popover类型的东西，但在这个例子中我需要它在标准按钮点击时发生。我已经做了很多搜索，这是我能够提出的代码（这是Button点击的代码）：

- (IBAction)showTagPicker:(id)sender {
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Select a Category" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil, nil];

[actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
CGRect frame = CGRectMake(0, 40, 320, 450);

PCCategory *categories = [[PCCategory alloc] init];
UIPickerView *picker = [[UIPickerView alloc] initWithFrame:frame];
picker.delegate = categories;
picker.dataSource = categories;

UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 464)];
pickerToolbar.barStyle = UIBarStyleBlackOpaque;
[pickerToolbar sizeToFit];

NSMutableArray *barItems = [[NSMutableArray alloc] init];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace 
                                                      target:self 
                                                      action:nil];
[barItems addObject:flexSpace];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone 
                                                       target:self 
                                                       action:@selector(tagSelected)];
[barItems addObject:doneButton];

[pickerToolbar setItems:barItems animated:YES];
[actionSheet addSubview:pickerToolbar];
[actionSheet addSubview:picker];
[actionSheet showInView:self.view];
[actionSheet setBounds:CGRectMake(0, 0, 320, 464)];

}

这似乎是在弹出框中创建选择器控件，但是控件非常小（它只显示大约1行）并且我正在显示的工具栏项都没有渲染。

see picture

如何控制尺寸？我已经尝试调整正在创建的两个CGRect对象的值，但这似乎没有太大区别。

Answer 1

在那种情况下，我总是使用UIPopoverController。您可以在IB中构建一个视图，其内部的选择器具有您想要的大小，然后将此视图添加到popoverController并从您想要的任何内容（文本字段，工具栏等）中显示它。

UPD：示例代码

UIViewController *vc = [UIViewController new];
vc.view = yourview; //With whatever you want in it
vc.contentSizeForViewInPopover = yourview.frame.size;
vc.navigationItem.title = @"Title"; // If you want one
UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:vc];
popover presentPopoverFromRect:rect inView: self.view premittedArrowDirections:UIPopoverArrowDirectionAny animated: YES]; 
//rect is a frame from which you would like to present your popover. For example:  yourUIButton.frame
if (yourview.hidden)
     [yourview setHidden:NO];

另一种解决方案是在IB中创建一个新的UIViewController，并将其与popover segue链接，但我认为这只是一个选择器视图的复杂。

通过按钮点击加载PickerView太小

1 个答案: