NSCoder is an abstractClass which represents a stream of data. They are used in Archiving and Unarchiving objects. NSCoder objects are usually used in a method that is being implemented so that the class conforms to the protocol. (which has something like encodeObject and decodeObject methods in them).
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Migrating Away from Threads The idea is that you eliminate work on your part, since the paradigm fits MOST code more easily. It reduces ...
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Yes, the object is retained. It creates a timer that calls a selector on the current threads run loop. It may not be 100% precise time-wise...
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Providing Counts for the Picker View – numberOfComponentsInPickerView: – pickerView:numberOfRowsInComponent: Delegate - Setting the Dim...