Aspects


vs


Nsobject

NSObject is the root class of most Objective-C class hierarchies; it has no superclass

Nsstring

NSString is the plain-text character-string class in Cocoa and Cocoa Touch

Others

Quality Example
Higher level

"Nsstring has a higher level it also inherited form nsobject const on it should have no effect in fact not the same meaning about the no effect on immutable object"

from question "What is a better practice when defining a const NSString object in objective-c?"

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