[英]Change Action sheet popover arrow in iOS8
i'm using UIAlertController
. 我正在使用
UIAlertController
。 But on iPad with iOS 8, actionSheet show with popover arrow. 但是在iOS 8的iPad上,actionSheet显示了弹出式箭头。 Any ideas to hide that arrow?
任何隐藏箭头的想法?
Here is my code: 这是我的代码:
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"this is alert controller" message:@"yeah" preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *cancelAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"Cancel", @"Cancel action")
style:UIAlertActionStyleCancel
handler:^(UIAlertAction *action)
{
NSLog(@"Cancel action");
}];
UIAlertAction *okAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"OK", @"OK action")
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action)
{
NSLog(@"OK action");
}];
UIAlertAction *deleteAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"Delete", @"Delete action")
style:UIAlertActionStyleDestructive
handler:^(UIAlertAction *action) {
NSLog(@"Delete action");
}];
[alertController addAction:cancelAction];
[alertController addAction:okAction];
[alertController addAction:deleteAction];
UIPopoverPresentationController *popover = alertController.popoverPresentationController;
if (popover) {
popover.sourceView = self.view;
popover.sourceRect = self.view.bounds;
popover.permittedArrowDirections = UIPopoverArrowDirectionUnknown;
}
[self presentViewController:alertController animated:YES completion:nil];
Solution : 方案:
use below line for remove arrow from action sheet
[yourAlertController.popoverPresentationController setPermittedArrowDirections:0];
Sample 样品
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Test Action Sheet" message:@"Message" preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *cancelAction = [UIAlertAction
actionWithTitle:@"Cancel"
style:UIAlertActionStyleDestructive
handler:^(UIAlertAction *action)
{
NSLog(@"Cancel action");
}];
UIAlertAction *okAction = [UIAlertAction
actionWithTitle:@"Ok"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action)
{
NSLog(@"OK action");
}];
UIAlertAction *otherAction = [UIAlertAction
actionWithTitle:@"Other"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action)
{
NSLog(@"Otheraction");
}];
[alertController addAction:okAction];
[alertController addAction:otherAction];
[alertController addAction:cancelAction];
// Remove arrow from action sheet.
[alertController.popoverPresentationController setPermittedArrowDirections:0];
//For set action sheet to middle of view.
alertController.popoverPresentationController.sourceView = self.view;
alertController.popoverPresentationController.sourceRect = self.view.bounds;
[self presentViewController:alertController animated:YES completion:nil];
Output 产量
Jageen在Swift中的回答:
popoverController.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)
The selected answer does not center the alert if you have a nav/status bar. 如果您有导航/状态栏,则所选答案不会使警报居中。 To exactly center your alert controller:
要使警报控制器准确居中:
alertController.popoverPresentationController.sourceRect = [self sourceRectForCenteredAlertController];
alertController.popoverPresentationController.sourceView = self.view;
alertController.popoverPresentationController.permittedArrowDirections = 0;
With the convenience method: 方便的方法:
- (CGRect)sourceRectForCenteredAlertController
{
CGRect sourceRect = CGRectZero;
sourceRect.origin.x = CGRectGetMidX(self.view.bounds)-self.view.frame.origin.x/2.0;
sourceRect.origin.y = CGRectGetMidY(self.view.bounds)-self.view.frame.origin.y/2.0;
return sourceRect;
}
Also, the alert controller does not stay centered if the view is rotated. 此外,如果旋转视图,警报控制器不会保持居中。 To keep the alert controller centered you need to update the sourceRect after rotation.
要使警报控制器保持居中,您需要在旋转后更新sourceRect。 For example:
例如:
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
// Check if your alert controller is still being presented
if (alertController.presentingViewController) {
alertController.popoverPresentationController.sourceRect = [self sourceRectForCenteredAlertController];
}
}
Or, if you do not want to use rotation events, you can use the popoverPresentationController
delegate method to reposition the popover: 或者,如果您不想使用旋转事件,可以使用
popoverPresentationController
委托方法重新定位弹出窗口:
- (void)popoverPresentationController:(UIPopoverPresentationController *)popoverPresentationController willRepositionPopoverToRect:(inout CGRect *)rect inView:(inout UIView *__autoreleasing _Nonnull *)view
{
// Re-center with new rect
}
You're on the wrong track using UIPopoverPresentationController to display an alert. 您使用UIPopoverPresentationController在错误的轨道上显示警报。 You just do not need that snipped of code...
你只是不需要剪切代码......
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"this is alert controller" message:@"yeah" preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *cancelAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"Cancel", @"Cancel action")
style:UIAlertActionStyleCancel
handler:^(UIAlertAction *action)
{
NSLog(@"Cancel action");
}];
UIAlertAction *okAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"OK", @"OK action")
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action)
{
NSLog(@"OK action");
}];
UIAlertAction *deleteAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"Delete", @"Delete action")
style:UIAlertActionStyleDestructive
handler:^(UIAlertAction *action) {
NSLog(@"Delete action");
}];
[alertController addAction:cancelAction];
[alertController addAction:okAction];
[alertController addAction:deleteAction];
[self presentViewController:alertController animated:YES completion:nil];
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