我正在將所有UIActionSheet
和UIAlertView
與UIAlertController
轉換。UIAlertController無法滿足約束條件
我的問題是當我嘗試呈現風格ActionSheet的UIAlertController
。 這裏是我的代碼:
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Title"
message:@"My message"
preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:nil];
[alert addAction:cancelAction];
UIAlertAction *OKAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil];
[alert addAction:OKAction];
UIAlertAction *destroyAction = [UIAlertAction actionWithTitle:@"Destroy" style:UIAlertActionStyleDestructive handler:nil];
[alert addAction:destroyAction];
UIPopoverPresentationController *popPresenter = [alert popoverPresentationController];
popPresenter.sourceView = self.view;
popPresenter.sourceRect = self.view.bounds;
[self presentViewController:alert animated:YES completion:nil];
以下是錯誤:
Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you
don't want. Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property
translatesAutoresizingMaskIntoConstraints)
(
"<NSLayoutConstraint:0x7c00ab40 H:[UIView:0x7c0764c0(304)]>",
"<NSLayoutConstraint:0x7b6c7f80 _UIAlertControllerView:0x7b6c2e50'title'.width >= UIView:0x7b6c3230.width>",
"<NSLayoutConstraint:0x7ccdfe40 _UIAlertControllerView:0x7b6c2e50'title'.width == UIView:0x7b6efbe0.width>",
"<NSAutoresizingMaskLayoutConstraint:0x7c33b9d0 h=--& v=--& H:[UIView:0x7c1094e0(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7c00ab40 H:[UIView:0x7c0764c0(304)]>
謝謝大家。
錯誤提示您嘗試將'alert.view.translatesAutoresizingMaskIntoConstraints'設置爲'NO'。你試過這個嗎? – n00neimp0rtant
是的,我試過 ''[alert.view setTranslatesAutoresizingMaskIntoConstraints:NO];',同樣的問題 –
你有沒有想過這個?我有同樣的問題。 – Fil