Answer by matt for [NSConcreteValue floatValue]: unrecognized selector sent...
Okay, it appears we are trying to observe the ISO property of an AVCaptureDevice. And it appears that sometimes it arrives as an NSValue that is not typed as an NSNumber. I don't know why that is, but...
View Article[NSConcreteValue floatValue]: unrecognized selector sent to instance
In my project I have this problem. I have a NSDictionary, when I try to call a value sometimes the app crash and Xcode give me this error: [NSConcreteValue floatValue]: unrecognized selector sent to...
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