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for example, I have
NSString *myClass = @"RootViewController"
How do I get class from NSString?
770
A static, plain-text Unicode string object that bridges to String ; use NSString when you need reference semantics or other Foundation-specific behavior.
(NSString *) is simply the type of the argument - a string object, which is the NSString class in Cocoa. In Objective-C you're always dealing with object references (pointers), so the "*" indicates that the argument is a reference to an NSString object.
Try this
id obj= [[NSClassFromString(@"RootViewController") alloc] init];
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