我想開發一個Xamarin Forms的項目,特別是Ios共享代碼,其中,我將綁定的谷歌Vr SDK庫完美ApDefinition & StructAndEnums類和GVRSDK靜態庫,我有一些問題需要解決。 當我將GVRVideoView小部件插入到ViewController中時,不會出現有關全屏和紙板視圖模式的兩個按鈕;我已經將自己的啓用方法插入代碼來執行此操作。 另外,當我點擊他們的應用程序崩潰和調試控制檯給我這些例外。我不知道我該怎麼做。 也許任何人都可以幫忙和我討論這些問題?NSInvalidArgumentException *** - [NSURL initFileURLWithPath:]:無字符串參數
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個App18.iOS 0x00f764b0 UIKit_UIApplication_Main_string___intptr_intptr + 52個 29 App18.iOS 0x00f76470 UIKit_UIApplication_Main_string___string_string + 204個 30 App18.iOS 0x0042d820 App18_iOS_Application_Main_string__ + 192個 31 App18.iOS 0x00690ae4
wrapper_runtime_invoke_obj ect_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 256 32 App18.iOS 0x0036cd45 mono_jit_runtime_invoke + 33 App18.iOS 0x003b9937 do_runtime_invoke + 78個 34 App18.iOS 0x003bb90d do_exec_main_checked + 84個 35 App18.iOS
0x0035b0ad mono_jit_exec + 194個 36 App18.iOS 0x0042c660 xamarin_main + 2484 37 App18.iOS 0x01143be1主+ 112 38 libdyld.dylib 0x1ae6e4eb + 2