Question

如何在目标C中更改UIPickerView的宽度，我使用以下代码，

    tempFiled = Data;
    [tempFiled resignFirstResponder];
    CGSize sizeOfPopover = CGSizeMake(200, 200);
    CGPoint positionOfPopover = CGPointMake(32, 325);
    [popOverControllerWithPicker presentPopoverFromRect:CGRectMake(positionOfPopover.x, positionOfPopover.y+10, 500, sizeOfPopover.height)
         inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

但是当我试图改变CGSize中的宽度sizeOfPopover = CGSizeMake（200,200）;它不会改变，我想减小选择器的大小。

Answer 1

我遇到了这个问题并以这种方式解决了这个问题：

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    CGRect frame = bpsPicker.frame;
    frame.size.width = 100; // width to be displayed on popover controller
    bpsPicker.frame = frame;

}

使用ViewDidLoad（）为时尚早，无法更改此值。

要清楚，viewWillAppear位于传递给UIPopover的UIViewController中（此处称为“MyViewController.m”）。所以，

self.myViewController = [[MyViewController alloc] initWithNibName:@"MyViewController" bundle:nil] ;
self.myViewController.delegate = self;
self.myViewController.contentSizeForViewInPopover = CGSizeMake(320, 360); // or whatever

self.myViewControllerPopover = [[UIPopoverController alloc] initWithContentViewController:self.myViewController] ; 

[self.myViewControllerPopover presentPopoverFromBarButtonItem:self.myToolBarButton permittedArrowDirections:UIPopoverArrowDirectionAny  animated:YES];

如何在目标C中更改UIPickerView的宽度

1 个答案: