应用程序崩溃时，Web服务

Question

我有一个表视图，其中Iam选择表视图的行，然后它击中Web服务，检索数据，然后显示。现在，这是Iam获得的错误日志。

终止应用程序由于未捕获的异常 'NSInvalidArgumentException'，原因是：“ -

[__NSCFData setDownloadedLogoImage:]: unrecognized selector sent to instance 0x806cf90' 
*** Call stack at first throw: 

(
    0 CoreFoundation      0x02abdb99 __exceptionPreprocess + 185 
    1 libobjc.A.dylib      0x02c0d40e objc_exception_throw + 47 
    2 CoreFoundation      0x02abf6ab -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 
    3 CoreFoundation      0x02a2f2b6 ___forwarding___ + 966 
    4 CoreFoundation      0x02a2ee72 _CF_forwarding_prep_0 + 50 
    5 FlightSearch      0x000401ef -[AirlineNames connectionDidFinishImage:] + 168 
    6 FlightSearch      0x0002f535 -[SAHttpManager connectionDidFinishLoading:] + 195 
    7 Foundation       0x001acb96 -[NSURLConnection(NSURLConnectionReallyInternal) sendDidFinishLoading] + 108 
    8 Foundation       0x001acaef _NSURLConnectionDidFinishLoading + 133 
    9 CFNetwork       0x0307172f _ZN19URLConnectionClient23_clientDidFinishLoadingEPNS_26ClientConnectionEventQueueE + 285 
    10 CFNetwork       0x0313cfcf _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 389 
    11 CFNetwork       0x03066968 _ZN19URLConnectionClient13processEventsEv + 100 
    12 CFNetwork       0x030667e5 _ZN17MultiplexerSource7performEv + 251 
    13 CoreFoundation      0x02a9efaf __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 
    14 CoreFoundation      0x029fd39b __CFRunLoopDoSources0 + 571 
    15 CoreFoundation      0x029fc896 __CFRunLoopRun + 470 
    16 CoreFoundation      0x029fc350 CFRunLoopRunSpecific + 208 
    17 CoreFoundation      0x029fc271 CFRunLoopRunInMode + 97 
    18 GraphicsServices     0x032b000c GSEventRunModal + 217 
    19 GraphicsServices     0x032b00d1 GSEventRun + 115 
    20 UIKit        0x00419af2 UIApplicationMain + 1160 
    21 FlightSearch      0x00001e86 main + 84 
    22 FlightSearch      0x00001e29 start + 53 
    23 ???         0x00000001 0x0 + 1 
) 

terminate called after throwing an instance of 'NSException' 

请建议我该怎么做。

Answer 1

您正在发送消息setDownloadedLogoImage:到一个NSData对象，它不知道该如何处理它！发生两件事之一：

1）你没有保留一些东西。看看你希望打电话给setDownloadedLogoImage的任何对象，并找出你在哪里创建它 - 你应该保留在那里;）

2）（较不可能）你的代码是错的！将其添加到您的问题，我们可以看看。