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iosobjective-cunrecognized-selector

Unrecognized Selector sent to instance even if method really exists

I am experiencing this very strange problem and I really don't know why this happens.

I am using a third party MQTT Client lib called MQTTKit. I am using it to build an MQTT client that connects to my broker using SSL/TLS. The author said in his blog that if I am going to use the lib together with the methods for TLS support, I'll have to add WITH_TLS=1 this macro to the build settings.

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So I did what he said.

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But when I compile and run the program, I got a crash stating that the method for TLS support was unrecognized. But how come there were no compiler problems when I built the app? Then it just got crash and say that the selector was not found? I don't understand this.

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Solution

  • The problem was solved after setting WITH_TLS=1 macro on the libMQTT target and rebuilt libMQTT.a