以NSException類型的未捕獲異常終止？

Question

當點擊一個按鈕以繼續進入新視圖時，我的應用程序崩潰。這出現：

int main(int argc, char * argv[]) 
{ 
    @autoreleasepool { 
     return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); 
    } 
} 

「返回UIApplicationMain ......」在綠色的亮點是「主題1：信號SIGABRT」結尾。 錯誤還包括這樣的輸出：

**Terminating app due to uncaught exception *** 'NSUnknownKeyException reason:'[<SlopeViewController 0x8b68c70> setValue:forUndefinedKey:]: this class is not key value  coding-compliant for the key m.' *** First throw call stack: (0x16b19b8 0x14328b6 0x17407c1 0x10f00ee 0x105c7db 0x105bd33 0x10be069 0x4b579b 0x14447d2 0x16acf5a 0x4b42f4 0x336e79 0x337491 0x337792 0x337c98 0x345912 0x345c5a 0x5aca79 0x34279a 0x3429a0 0x3429e0 0x73dd2b 0x72e181 0x72e1fc 0x1444874 0x2343b7 0x234343 0x32027e 0x320641 0x31f8fd 0x26fa0d 0x270266 0x245076 0x232efb 0x2ee332b 0x162d48d 0x162d3e5 0x162d11b 0x1657b30 0x165710d 0x1656f3b 0x35f5ff2 0x35f5e19 0x2304eb 0x6fd3 0x1d1370d 0x1) 
libc++abi.dylib: terminating with uncaught exception of type NSException 
(lldb 

我不知道該怎麼做。請幫忙！

Answer 1

爲了防止NSException崩潰，您應該點擊交叉（X），以去掉黃三角：