Question

我正在Xcode（4.4.1）上构建一个iOS（5.1）应用程序，我几乎完成了第一阶段的开发，但我仍然坚持最后一行代码。我一直在使用Kumulos作为后端＆amp; API解决方案，目前所有API工作正常，除了这一点：

Kumulos* k = [[Kumulos alloc]init];
[k setDelegate:self];
[k createNewTimePointWithJourneyIDFK:[journeyID integerValue]
    andTime:currentDate andLat:[lat floatValue] andLon:[lon floatValue]];

当它命中createNewTimePointWithJourneyIDFK：方法时，它会终止。在日志中它提到了这个方法，并说一个无法识别的选择器被发送到一个实例。

现在我意识到这个问题在SO上被问了一百万次，但是我已经1）检查了方法是否被定义了，2）它已被正确调用（或者至少据我所知））。我完成上述操作的方式是我完成其余API调用的方式，并且它们运行良好，所以我看不出问题所在。非常令人沮丧，我花了好几个小时在最后一行！所以请不要以为我在几分钟后不知道该怎么做就听到了。

错误消息

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)

方法

它位于Kumulos.m文件中。

-(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;
}

Answer 1

我唯一能想到的是你的项目中陈旧的东西。您是否尝试过清洁（通过产品→清洁）并重建？

为什么在定义方法时出现“无法识别的选择器发送到实例”错误？

1 个答案: