Question

我正在尝试使用Xamarin Forms开发一个项目，特别是Ios共享代码，其中我将Google Vr SDK库与ApDefinition＆amp; StructAndEnums类和GVRSDK静态库，我有一些问题需要解决。当我将GVRVideoView小部件插入我的ViewController时，不会出现关于全屏和纸板视图模式的两个按钮;我已经将自己的启用方法插入到代码中来执行此操作。此外，当我点击它们时，应用程序崩溃，调试控制台给我这些例外。我不知道应该尝试做些什么。也许有人可以帮我讨论这些问题吗？

2017-04-12 12:45:00.413 App18.iOS[1335:1127396] INFO 
[vr/gvr/capi/src/gvr.cc:109] Initialized GVR version 1.30.0
2017-04-12 12:45:04.872 App18.iOS[1335:1127349] Xamarin.iOS: Received 
unhandled ObjectiveC exception: NSInvalidArgumentException *** -[NSURL 
initFileURLWithPath:]: nil string parameter
2017-04-12 12:45:05.179 App18.iOS[1335:1127349] Objective-C exception 
thrown.  Name: NSInvalidArgumentException Reason: *** -[NSURL 
initFileURLWithPath:]: nil string parameter
Native stack trace:
0   CoreFoundation                      0x1b773b55 <redacted> + 152
1   libobjc.A.dylib                     0x1a9fb067 objc_exception_throw + 38
2   CoreFoundation                      0x1b773a85 <redacted> + 0
3   Foundation                          0x1c01fc69 <redacted> + 120
4   Foundation                          0x1c01fbdb <redacted> + 42
5   App18.iOS                           0x00098e67 -[GVRTransitionView 
loadView] + 510
6   App18.iOS                           0x00098c0f -[GVRTransitionView 
initWithFrame:delegate:] + 190
7   App18.iOS                           0x0008e277 -
[GVROverlayViewController init] + 246
8   App18.iOS                           0x000a0f6d -[GVRWidgetView 
goIntoFullscreenMode] + 76
9   App18.iOS                           0x000a198d -[GVRWidgetView 
didTapFullscreenButton:] + 20
1
0  UIKit                               0x209d6805 <redacted> + 76
11  UIKit                               0x209d6799 <redacted> + 62
12  UIKit                               0x209c0dc9 <redacted> + 478
13  UIKit                               0x209d60d5 <redacted> + 604
14  UIKit                               0x209d5c1f <redacted> + 2094
15  UIKit                               0x209d0b5f <redacted> + 2798
16  UIKit                               0x209a2703 <redacted> + 308
17  UIKit                               0x21135d37 <redacted> + 2254
18  UIKit                               0x211306db <redacted> + 4186
19  UIKit                               0x21130abd <redacted> + 144
20  CoreFoundation                      0x1b72ffdd <redacted> + 12
21  CoreFoundation                      0x1b72fb05 <redacted> + 424
22  CoreFoundation                      0x1b72df51 <redacted> + 1160
23  CoreFoundation                      0x1b6810ef CFRunLoopRunSpecific + 
470
24  CoreFoundation                      0x1b680
f11 CFRunLoopRunInMode + 104
25  GraphicsServices                    0x1ce2bb41 GSEventRunModal + 80
26  UIKit                               0x20a05e83 UIApplicationMain + 150
27  App18.iOS                           0x00fd2d6c

wrapper_managed_to_native_UIKit_UIApplication_UIApplicationMain_int_string ___ INT ptr_intptr + 324 28 App18.iOS 0x00f764b0 UIKit_UIApplication_Main_string___intptr_intptr + 52 29 App18.iOS 0x00f76470 UIKit_UIApplication_Main_string___string_string + 204 30 App18.iOS 0x0042d820 App18_iOS_Application_Main_string__ + 192 31 App18.iOS 0x00690ae4

wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 256 32 App18.iOS 0x0036cd45 mono_jit_runtime_invoke + 1528 33 App18.iOS 0x003b9937 do_runtime_invoke + 78 34 App18.iOS 0x003bb90d do_exec_main_checked + 84 35 App18.iOS
0x0035b0ad mono_jit_exec + 194 36 App18.iOS 0x0042c660 xamarin_main + 2484 37 App18.iOS 0x01143be1 main + 112 38 libdyld.dylib 0x1ae6e4eb + 2

Answer 1

不知怎的，你传递'nil'作为方法中的参数[NSURL initFileURLWithPath：]。添加断点以检查您在方法中传递的值。还要共享代码，以便我们为您提供更好的建议。

NSInvalidArgumentException *** - [NSURL initFileURLWithPath：]：nil字符串参数

1 个答案: