Question

我的应用在点击“共享”时崩溃（仅限部分用户）。这是代码：

@IBAction func btnShare(sender: AnyObject) {
    let message = "Some message"
    let shareUrl = "mydomain://someurl/\(someid)"

    if let url = NSURL(string: shareUrl) {
        let objectsToShare = [message, url]
        let activityVC = UIActivityViewController(activityItems: objectsToShare, applicationActivities: nil)
        activityVC.excludedActivityTypes = [UIActivityTypeAirDrop, UIActivityTypeAddToReadingList]
        activityVC.popoverPresentationController?.sourceView = sender as! UIView
        self.presentViewController(activityVC, animated: true, completion: nil)
    }
}

这是崩溃报告：

Crashed: com.apple.main-thread
0  libsystem_kernel.dylib         0x184a32014 __pthread_kill + 8
1  libsystem_pthread.dylib        0x184af9460 pthread_kill + 112
2  libsystem_c.dylib              0x1849a63f4 abort + 140
3  libswiftCore.dylib             0x100d83928 swift::fatalError(char const*, ...) + 50
4  libswiftCore.dylib             0x100d6c0f0 swift::swift_dynamicCastFailure(void const*, char const*, void const*, char const*, char const*) + 70
5  libswiftCore.dylib             0x100d6c180 swift::swift_dynamicCastFailure(swift::Metadata const*, swift::Metadata const*, char const*) + 142
6  libswiftCore.dylib             0x100d92460 swift_dynamicCastObjCClassUnconditional + 68
7  Wize                           0x100117198 specialized MyViewController.btnShare(AnyObject) -> () (MyViewController.swift:363)
8  Wize                           0x1001132b0 @objc MyViewController.btnShare(AnyObject) -> () (MyViewController.swift)
9  UIKit                          0x18b8e27b0 -[UIApplication sendAction:to:from:forEvent:] + 96
10 UIKit                          0x18ba565ec -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 168
11 UIKit                          0x18b8e27b0 -[UIApplication sendAction:to:from:forEvent:] + 96
12 UIKit                          0x18b8e2730 -[UIControl sendAction:to:forEvent:] + 80
13 UIKit                          0x18b8ccbe4 -[UIControl _sendActionsForEvents:withEvent:] + 452
14 UIKit                          0x18b8ccd4c -[UIControl _sendActionsForEvents:withEvent:] + 812
15 UIKit                          0x18b8e201c -[UIControl touchesEnded:withEvent:] + 584
16 UIKit                          0x18b8e1b44 -[UIWindow _sendTouchesForEvent:] + 2484
17 UIKit                          0x18b8dcd8c -[UIWindow sendEvent:] + 2988
18 UIKit                          0x18b8ad858 -[UIApplication sendEvent:] + 340
19 UIKit                          0x18c09acb8 __dispatchPreprocessedEventFromEventQueue + 2736
20 UIKit                          0x18c094720 __handleEventQueue + 784
21 CoreFoundation                 0x185a12278 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
22 CoreFoundation                 0x185a11bc0 __CFRunLoopDoSources0 + 524
23 CoreFoundation                 0x185a0f7c0 __CFRunLoopRun + 804
24 CoreFoundation                 0x18593e048 CFRunLoopRunSpecific + 444
25 GraphicsServices               0x1873c1198 GSEventRunModal + 180
26 UIKit                          0x18b918628 -[UIApplication _run] + 684
27 UIKit                          0x18b913360 UIApplicationMain + 208
28 Wize                           0x1001208f4 main (AppDelegate.swift:19)
29 libdispatch.dylib              0x1849205b8 (Missing)

知道可能会发生什么吗？它适用于一半的用户。

Answer 1

在转换前检查发件人：

    guard let sourceView = sender as? UIView else {
        return
    }

...

activityVC.popoverPresentationController?.sourceView = sourceView

Answer 2

对于以下行

 activityVC.popoverPresentationController?.sourceView = sender as! UIView

添加此行

 if let senderSourceView = sender as? UIView {

    activityVC.popoverPresentationController?.sourceView = senderSourceView

 }else{
    //Here not getting UIView
 }

可能是App崩溃了，因为如果UIView没有获得sourceView.It是正常工作，如我所说。

尝试共享视图时应用程序崩溃

2 个答案: