UIAlertController is Crashed (iPad)
J'utilise Xcode 6 pour développer une application iOS.
Lorsque j'ai utilisé UIAlertController, cela fonctionne bien sur le simulateur iPhone 6, mais se bloque sur le simulateur iPad.
Mon problème en cliquant sur "partager", alors il pourrait être écrasé ... Comment puis-je le résoudre?
Voici mon code:
override func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [AnyObject] {
var shareAction = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Share", handler: { (action:UITableViewRowAction!, indexPath:NSIndexPath!) -> Void in
let shareMenu = UIAlertController(title: nil, message: "Share using", preferredStyle: .ActionSheet)
let twitterAction = UIAlertAction(title: "Twitter", style: UIAlertActionStyle.Default, handler: nil)
let facebookAction = UIAlertAction(title: "Facebook", style: UIAlertActionStyle.Default, handler: nil)
let emailAction = UIAlertAction(title: "Email", style: UIAlertActionStyle.Default, handler: nil)
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil)
shareMenu.addAction(twitterAction)
shareMenu.addAction(facebookAction)
shareMenu.addAction(emailAction)
shareMenu.addAction(cancelAction)
self.presentViewController(shareMenu, animated: true, completion: nil)
}
)
Xcode a montré ce message:
******Terminating app due to uncaught exception 'NSGenericException', reason: 'Your application has presented a UIAlertController (<UIAlertController: 0xaf71c80>) of style UIAlertControllerStyleActionSheet. The modalPresentationStyle of a UIAlertController with this style is UIModalPresentationPopover. You must provide location information for this popover through the alert controller's popoverPresentationController. You must provide either a sourceView and sourceRect or a barButtonItem. If this information is not known when you[![enter image description here][1]][1] present the alert controller, you may provide it in the UIPopoverPresentationControllerDelegate method -prepareForPopoverPresentation.'
*** First throw call stack:
(
0 CoreFoundation 0x0023c746 __exceptionPreprocess + 182
1 libobjc.A.dylib 0x01c7aa97 objc_exception_throw + 44
2 UIKit 0x012c4062 -[UIPopoverPresentationController presentationTransitionWillBegin] + 3086
3 UIKit 0x00bda174 __71-[UIPresentationController _initViewHierarchyForPresentationSuperview:]_block_invoke + 1549
4 UIKit 0x00bd8247 __56-[UIPresentationController runTransitionForCurrentState]_block_invoke + 198
5 UIKit 0x00c0d31b __40+[UIViewController _scheduleTransition:]_block_invoke + 18
6 UIKit 0x00ac6862 ___afterCACommitHandler_block_invoke + 15
7 UIKit 0x00ac680d _applyBlockToCFArrayCopiedToStack + 415
8 UIKit 0x00ac6622 _afterCACommitHandler + 549
9 CoreFoundation 0x0015d86e __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
10 CoreFoundation 0x0015d7b0 __CFRunLoopDoObservers + 400
11 CoreFoundation 0x001531ea __CFRunLoopRun + 1226
12 CoreFoundation 0x00152a5b CFRunLoopRunSpecific + 443
13 CoreFoundation 0x0015288b CFRunLoopRunInMode + 123
14 GraphicsServices 0x047b82c9 GSEventRunModal + 192
15 GraphicsServices 0x047b8106 GSEventRun + 104
16 UIKit 0x00a9c106 UIApplicationMain + 1526
17 Mars I 0x0001c724 main + 180
18 libdyld.dylib 0x02392ac9 start + 1
19 ??? 0x00000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException******
Pour le garder indépendant du périphérique, utilisez-le plutôt comme indiqué dans l'extrait de code ci-dessous. Ce code renverra nil pour popoverPresentationController sur un iPhone/appareil de taille compacte, afin que vous puissiez l'utiliser en toute sécurité dans des projets universels.
if let popoverPresentationController = shareMenu.popoverPresentationController {
popoverPresentationController.sourceView = self.view
popoverPresentationController.sourceRect = sender.bounds
}
self.presentViewController(shareMenu, animated: true, completion: nil)
essayez ce code:
shareMenu.popoverPresentationController.sourceView = self.view
shareMenu.popoverPresentationController.sourceRect = CGRectMake(self.view.bounds.size.width / 2.0, self.view.bounds.size.height / 2.0, 1.0, 1.0)
self.presentViewController(shareMenu, animated: true, completion: nil)
Swift 4
popoverPresentationController.permittedArrowDirections = .init(rawValue: 0)
popoverPresentationController.sourceView = self.view
popoverPresentationController.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0)
Je suis aussi confronté au même problème et j'ai finalement eu la solution. voici ma solution pour Objective C
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Select you option:"
message:nil
preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *action = [UIAlertAction actionWithTitle:@“share”
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action) {
// do other things
}];
[alertController addAction:action];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel"
style:UIAlertActionStyleCancel
handler:^(UIAlertAction *action) {
}];
[alertController addAction:cancelAction];
// Remove arrow from action sheet.
[alertController.popoverPresentationController setPermittedArrowDirections:0];
//For set action sheet to middle of view.
CGRect rect = self.view.frame;
rect.Origin.x = self.view.frame.size.width / 20;
rect.Origin.y = self.view.frame.size.height / 20;
alertController.popoverPresentationController.sourceView = self.view;
alertController.popoverPresentationController.sourceRect = rect;
[self presentViewController:alertController animated:YES completion:nil];
J'utilise cette extension pratique pour créer des feuilles d'action qui ne plantent jamais
extension UIAlertController {
class func actionSheetWith(title: String?, message: String?, sourceView: UIView?, sourceFrame: CGRect?) -> UIAlertController {
let actionController = UIAlertController(title: title, message: message, preferredStyle: .actionSheet)
if actionController.responds(to: #selector(getter: popoverPresentationController)) {
actionController.popoverPresentationController?.sourceView = sourceView ?? StoryboardHelper.tabBarControllerTopController()?.view
actionController.popoverPresentationController?.sourceRect = sourceFrame ?? CGRect(x: 0, y: 0, width: 0, height: 0)
}
return actionController
}
}
J'utilise ce code, très facile et compréhensible, je peux peut-être vous aider pour tout
//if iPhone
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
[self presentViewController:actionSheet animated:YES completion:nil];
}
//if iPad
else {
// Change Rect to position Popover
UIPopoverController *popup = [[UIPopoverController alloc] initWithContentViewController:actionSheet];
[popup presentPopoverFromRect:CGRectMake(self.view.frame.size.width/2, self.view.frame.size.height/4, 0, 0)inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
Swift 3
shareMenu.popoverPresentationController?.sourceView = self.view
shareMenu.popoverPresentationController?.sourceRect =
CGRect(x: view.bounds.size.width,
y: view.bounds.size.height-80,
width: 1.0, height: 1.0)
source rect est le point à partir duquel vous souhaitez afficher une vue popover.
référence: ActionSheet Popover sur iPad dans Swift
créer popoverController:
let alertController = UIAlertController(title: nil, message: "Alert message.", preferredStyle: .actionSheet)
self.present(alertController, animated: true, completion: nil)
si vous souhaitez afficher une alerte avec vue indicateur, vous devez:
if let popoverController = alertController.popoverPresentationController {
popoverController.barButtonItem = sender
}
afficher l'alerte au centre:
if let popoverController = alertController.popoverPresentationController {
popoverController.sourceView = self.view
popoverController.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0)
}
centre pas d'indicateur:
if let popoverController = alertController.popoverPresentationController {
popoverController.sourceView = self.view
popoverController.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0)
popoverController.permittedArrowDirections = []
}