iPad 框架上的 UIActionSheet 太小

Question

我试图在 iPad 上显示一个 UIActionSheet 并在其中显示一个 UIPickerView，我有适用于 iPhone 的等效代码，所以我的 UIPickerView 委托和数据源的东西可以工作，但是当我使用 @ 时在 iPad 上987654324@ 结果UIPopover/UIActionSheet 太小了，我似乎无法设置框架大小，也没有显示任何按钮。

我不知道这是因为它们超出了界限还是发生了其他事情。这是我删除所有非必要代码（iPhone 等）后代码的样子。有谁知道我做错了什么，有没有人知道任何例子。

CGRect thePickerFrame = CGRectMake(0, 0, 320.0, 485.0);
UIPickerView * thePickerView = [[UIPickerView alloc] initWithFrame:thePickerFrame];

[pickerActionSheet release], pickerActionSheet =
        [[UIActionSheet alloc] initWithTitle:@"Choose" delegate:self 
                               cancelButtonTitle:@"Cancel"
                               destructiveButtonTitle:nil
                               otherButtonTitles:@"Next", nil];
thePickerView.showsSelectionIndicator = YES;
thePickerView.dataSource = self;
thePickerView.delegate = self;

[pickerActionSheet addSubview:thePickerView];
[thePickerView selectRow:0 inComponent:0 animated:NO];
[thePickerView release];

[pickerActionSheet showFromRect:currentTextField.bounds
                             inView:currentTextField animated:NO];
pickerActionSheet.frame = thePickerFrame;

Answer 1

我认为 UIActionSheet 无法调整大小，尝试在代码中注释 [pickerActionSheet addSubview:thePickerView]; 行，您会发现 ActionSheet 非常适合按钮。

我会推荐 UIPopoverController 和自定义 UIViewController。像这样的：

UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
toolbar.barStyle = UIBarStyleDefault;

UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc] initWithTitle:@"back" style:UIBarButtonItemStyleBordered target:self action:@selector(BACK_ACTION:)];
UIBarButtonItem *chooseButton = [[UIBarButtonItem alloc] initWithTitle:@"Choose" style:UIBarButtonItemStylePlain target:nil action:nil];
UIBarButtonItem *nextButton = [[UIBarButtonItem alloc] initWithTitle:@"Next" style:UIBarButtonItemStyleBordered target:self action:@selector(NEXT_ACTION:)];
UIBarButtonItem *fixed1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *fixed2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

[toolbar setItems:[NSArray arrayWithObjects:cancelButton, fixed1, chooseButton, fixed2, nextButton, nil]];

UIPickerView    *thePickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 44, 320, 216)];
CGRect thePickerFrame = thePickerView.frame;
thePickerFrame.origin.y = toolbar.frame.size.height;
[thePickerView setFrame:thePickerFrame];


UIView *view = [[UIView alloc] init];
[view addSubview:thePickerView];
[view addSubview:toolbar];

UIViewController *vc = [[UIViewController alloc] init];
[vc setView:view];
[vc setContentSizeForViewInPopover:CGSizeMake(320, 260)];

popover = [[UIPopoverController alloc] initWithContentViewController:vc];

thePickerView.showsSelectionIndicator = YES;
thePickerView.dataSource = self;
thePickerView.delegate = self;

[thePickerView selectRow:0 inComponent:0 animated:NO];

[popover presentPopoverFromRect:currentTextField.bounds inView:currentTextField permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

其中 popover 是在 .h (UIPopoverController *popover;) 中声明的类变量。

顺便说一下，我用的是ARC，所以代码里没有release。

Answer 2

我设法用一种愚蠢的方式让它工作。

供您参考：
设置 PickerView。

UIActionSheet 的 宽度无法以某种方式调整，因此必须相应调整pickerView。高度方面，您可以调整 actionSheet 标题中 "\n" 的数量。

UIDatePicker * pickerView = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 0, 270, 220)];
pickerView.datePickerMode = UIDatePickerModeDate; 

UIActionSheet * actionSheet = [[UIActionSheet alloc] initWithTitle:@"\n\n\n\n\n\n\n\n\n\n\n\n\n" delegate:nil cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles: nil];    

[actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
[actionSheet addSubview:pickerView];
[actionSheet showFromRect:button.frame inView:button.superview animated:YES];
[actionSheet release];

Set Frame or Bound 对我不起作用。

[actionSheet setBounds:pickerView.frame];   
[actionSheet setFrame:pickerView.frame];

同意使用 UIPopoverController，但不知道为什么，当我将 UIDatePickerView 放入 popover 时出现了严重的 UI 延迟（弹出几乎 1 秒的延迟），我找不到根本原因。所以不得不回退到上述方法。


快乐编码。