ios UIAlertController 已崩溃 (iPad)
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/31577140/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
UIAlertController is Crashed (iPad)
提问by isaced
I am using Xcode 6 to develop an iOS Application.
我正在使用 Xcode 6 开发 iOS 应用程序。
When I used UIAlertController, it can be worked well on iPhone 6 simulator, but crashes on iPad simulator.
当我使用 时UIAlertController，它可以在 iPhone 6 模拟器上运行良好，但在 iPad 模拟器上崩溃。
My problem while clicking "share", then it could be crashed. How could I solve it?
单击“共享”时出现问题，然后它可能会崩溃。我怎么能解决呢？
Here is my Code:
这是我的代码：
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 showed this message:
Xcode 显示此消息：
******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******
回答by Karoly Nyisztor
To keep it device independent, rather use it as shown in the snippet below. This code will return nil for popoverPresentationController on an iPhone / compact size device, so you can safely use it in universal projects.
为了保持设备独立，不如使用它，如下面的代码片段所示。此代码将为 iPhone / 紧凑型设备上的 popoverPresentationController 返回 nil，因此您可以在通用项目中安全地使用它。
if let popoverPresentationController = shareMenu.popoverPresentationController {
popoverPresentationController.sourceView = self.view
popoverPresentationController.sourceRect = sender.bounds
}
self.presentViewController(shareMenu, animated: true, completion: nil)
回答by isaced
try this code:
试试这个代码：
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)
回答by kurtanamo
Swift 4
斯威夫特 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)
回答by Mayuri R Talaviya
I am also face same issue and finally got the solution. Here is my solution for Objective-C:
我也面临同样的问题，终于得到了解决方案。这是我对 Objective-C 的解决方案：
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];
回答by yuelong qin
reference: ActionSheet Popover on iPad in Swift
参考： Swift 中 iPad 上的 ActionSheet Popover
create popoverController :
创建 popoverController ：
let alertController = UIAlertController(title: nil, message: "Alert message.", preferredStyle: .actionSheet)
self.present(alertController, animated: true, completion: nil)
if you want show alert with indicator view should:
如果你想用指示器视图显示警报应该：
if let popoverController = alertController.popoverPresentationController {
popoverController.barButtonItem = sender
}
show alert in center:
在中心显示警报：
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)
}
center no indicator:
中心无指标：
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 = []
}
回答by Jo?e Ws
I use this handy extension to create action sheets that never crash
我使用这个方便的扩展来创建永不崩溃的操作表
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
}
}
回答by Genevios
I use this code, very easy and understand, maybe i can help for any
我使用此代码，非常简单易懂，也许我可以帮助任何
//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];
}
回答by sohail059
Swift 3
斯威夫特 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 is the point from were you want to show popover view.
source rect 是您想要显示弹出视图的重点。
回答by Jaydip
for iOS 13
适用于iOS 13
used it.
使用了它。
if #available(iOS 13.0, *) {
if let popoverPresentationController = actionSheet.popoverPresentationController {
popoverPresentationController.sourceView = self.view
popoverPresentationController.sourceRect = sender.frame
}
self.present(actionSheet, animated: true, completion: nil)
} else {
actionSheet.popoverPresentationController?.sourceView = self.view
actionSheet.popoverPresentationController?.sourceRect = sender.frame
actionSheet.show()
}
回答by Olexa Boyko
If you don't need presenting the alert as popover, you can simply use UIAlertController.Style.alertas preferred style, when initializing AlertViewController.
如果您不需要将警报显示为弹出框，您可以UIAlertController.Style.alert在初始化AlertViewController.
let shareMenu = UIAlertController(title: nil, message: "Share using", preferredStyle: .alert)
