ios - UIPopoverController 太大，UIPickerView 太小

Question

我在 UIPopoverController 中显示了一个 UIPickerView。 UIPickerView 的尺寸为:320x216。出于某种原因，UIPickerView 似乎是正常高度的 3/5，而 UIPopoverController 一直延伸到屏幕底部。

请看下面的代码。

谢谢!

self.picker = [[[UIPickerView alloc] initWithFrame:CGRectMake(0, self.view.bounds.size.height+44, 320, 216)] autorelease];
self.picker.backgroundColor = [UIColor clearColor];
self.picker.showsSelectionIndicator = YES;
self.picker.delegate = self;
self.picker.dataSource = self;
self.picker.transform = CGAffineTransformMakeScale(-1, 1);
UIViewController *pickerController = [[UIViewController alloc] init];
[pickerController setView:self.picker];
UIPopoverController *pickerPopover = [[UIPopoverController alloc] initWithContentViewController:pickerController];
[pickerPopover presentPopoverFromBarButtonItem:sender permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
pickerPopover.delegate = self;
self.popover = pickerPopover;
[pickerController release];
[pickerPopover release];

Answer 1

“压缩”选择器 View 的原因似乎是这一行:

[pickerController setView:self.picker];

相反，将选择器 View 添加为 subview :

[pickerController.view addSubview:picker];

接下来，要固定弹出高度，请在呈现之前设置 popoverContentSize:

pickerPopover.popoverContentSize = picker.frame.size;

此外，从这里修复选择器 View 的框架:

CGRectMake(0, self.view.bounds.size.height+44, 320, 216)

为此:

CGRectMake(0, 0, 320, 216)