OBJECT-C syntax-nsobject common methods and reflections

NSObject Common methods

• -(BOOL) Iskindofclass: (Class) AClass//To determine whether an instance of AClass or AClass subclass, AClass can be obtained by [class name class]
• -(BOOL) Ismemberofclass: (Class) AClass//Determine if the instance is AClass (excluding AClass subclasses)
• -(BOOL) Conformstoprotocol: (Protocol) Aprotocol//Determine if the object implements the Aprotocol protocol
• + (BOOL) Instancesrespondtoselector: (SEL) aselector//Determine if the object of this class has a method provided by the parameter Aselector
• -(BOOL) Respondstoselector: (SEL) aselector//Determine if the object has the method provided by the parameter Aselector
• -(void) Performselector: (SEL) Aselector withobject: (ID) anargument afterdelay: (nstimeinterval) delay//Delay call parameter provided method, Method required parameters are passed in Withobject

Reflection

• Reflection of Class

Instantiating an object as a string of a class name

Class class = Nsclassfromstring (@ "Student");

Student *stu = [[Class alloc] init];

Turn the class name into a string

Class class = [Student class];

NSString *classname = Nsstringfromclass (Class);

• The reflection of the SEL

Instantiating methods by string form of a method

SEL selector = nsselectorfromstring (@ "setName:");

[Stu Performselector:selector withobject:@ "Mike"];

Turn a method into a string

Nsstringfromselector (@selector (setName:));

OBJECT-C syntax-nsobject common methods and reflections