我在Xcode(4.4.1)上構建了一個iOS(5.1)應用程序,而且我幾乎完成了開發的第一階段,但是我被困在最後一行代碼中。我一直在使用Kumulos作爲後端& API的解決方案,而且目前所有的API工作正常,除了這一點:我爲什麼在定義方法時收到「無法識別的選擇器發送給實例」錯誤?
Kumulos* k = [[Kumulos alloc]init];
[k setDelegate:self];
[k createNewTimePointWithJourneyIDFK:[journeyID integerValue]
andTime:currentDate andLat:[lat floatValue] andLon:[lon floatValue]];
當它擊中createNewTimePointWithJourneyIDFK:方法,它終止。在日誌中它提到了這種方法,並說一個無法識別的選擇器被髮送到一個實例。
現在我意識到這個問題已經被提出了一百萬次,但是我已經1)檢查了方法已經被定義了,2)它被調用了正確的(或者至少是我的最好的知識)。我完成上述操作的方式是我完成其餘API調用的方式,並且它們運行良好,因此我看不出問題所在。非常沮喪,我花了幾個小時在這最後一行!所以請不要以爲我在幾分鐘後不知道該怎麼做纔會聽到。
該錯誤消息
2012-08-11 22:36:58.769 busApp4Kumulos[5485:707] -[Kumulos
createNewTimePointWithJourneyIDFK:andTime:andLat:andLon:]:
unrecognizedselector sent to instance 0x3d1b70 2012-08-11 22:36:58.778
busApp4Kumulos[5485:707]
*** Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: '-[Kumulos
createNewTimePointWithJourneyIDFK:andTime:andLat:andLon:]:
unrecognized selector sent to instance 0x3d1b70'
*** First throw call stack:
(0x35add88f 0x37e84259 0x35ae0a9b 0x35adf915 0x35a3a650 0x3ef5
0x37f86de3 0x37f86785 0x37f80e3f 0x35ab1b01 0x35ab112f 0x35ab0351
0x35a334a5 0x35a3336d 0x376cf439 0x3353fcd5 0x2dd9 0x2d74)
terminate called throwing an exception(lldb)
的方法
這位於Kumulos.m文件。
-(KSAPIOperation*) createNewTimePointWithJourneyIDFK:(NSInteger)journeyIDFK
andTime:(NSDate*)time andLat:(float)lat andLon:(float)lon{
NSMutableDictionary* theParams = [[NSMutableDictionary alloc]init];
[theParams setValue:[NSNumber numberWithInt:journeyIDFK] forKey:@"journeyIDFK"];
[theParams setValue:time forKey:@"time"];
[theParams setValue:[NSNumber numberWithFloat:lat] forKey:@"lat"];
[theParams setValue:[NSNumber numberWithFloat:lon] forKey:@"lon"];
KSAPIOperation* newOp = [[KSAPIOperation alloc]initWithAPIKey:theAPIKey
andSecretKey:theSecretKey andMethodName:@"createNewTimePoint"
andParams:theParams];
[newOp setDelegate:self];
[newOp setUseSSL:useSSL];
//we pass the method signature for the kumulosProxy callback on this thread
[newOp setCallbackSelector:@selector(kumulosAPI: apiOperation: createNewTimePointDidCompleteWithResult:)];
[newOp setSuccessCallbackMethodSignature:[self methodSignatureForSelector:@selector(apiOperation: didCompleteWithResult:)]];
[newOp setErrorCallbackMethodSignature:[self methodSignatureForSelector:@selector(apiOperation: didFailWithError:)]];
[opQueue addOperation:newOp];
return newOp;
}
請顯示實際的錯誤信息。我懷疑問題出在圖書館本身。 – 2012-08-11 12:52:37
你能粘貼確切的錯誤信息嗎? – sergio 2012-08-11 12:52:46
道歉,它現在被添加。 – andrewb 2012-08-11 12:56:25