iphone - iOS App Exception - Terminating app due to uncaught exception 'NSInvalidArgumentException' -


i getting following exception, terminating app.

terminating app due uncaught exception 'nsinvalidargumentexception', reason: '-[__nsarraym objectforkey:]: unrecognized selector sent instance 0x7abe4f90'

following code:

- (nsmutabledata*)dataforconnection:(urlconnection*)connection {        nsmutabledata *data = [receiveddata objectforkey:connection.tagkey]; // exception here return data; }

could please suggest how fix it? thank in advance!

problem due not allocating receiveddata properly, since have declared instance variable, should make using property declaration this:

@property(nonatomic, strong) nsmutabledictionary *receiveddata;

this ensure receiveddata not released , reference using self.receiveddata in code. maybe helpful


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