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Objective-C dot notation with class methods?


By : Thiago Vergani
Date : October 17 2020, 11:12 AM
may help you . This is correct behavior. foo.method is syntactic sugar for [foo method]—a straight conversion with identical semantics. Similarly foo.prop = bar is syntactic sugar for [foo setProp:bar], again with identical semantics. This transformation is implemented in the compiler. Thus you can use dot notation to call 0-parameter methods as in foo.doSomething instead of [foo doSomething]. Of course, if you do this, you are evil.
The fact that the callee is a class instance doesn't mater because in Objective-C, classes are also objects. Using dot notation on a class calls the parameterless method on that class.
code :


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Suggest best way to use class methods and object methods in Objective-C?


By : Jerome
Date : March 29 2020, 07:55 AM
it should still fix some issue Well, completely seriously, class methods should be specific to a class, and instance methods should be specific to an instance. Think about the method in question; does it depend on instance variables? Is it referring to a specific instance of the class in question? Or is it more general than that?
Frequently, class methods are convenient ways to return instances (for example, [NSColor redColor] is a handy class method for returning a common instance of NSColor). On the other hand, the instance method -greenComponent (which returns the green component of an RGB color) clearly needs to refer to a specific instance (if I asked you, "how much green is in color?" that wouldn't make sense. It's "how much green is in this color here?" that is a reasonable question).

Purpose of Instance Methods vs. Class Methods in Objective-C


By : jaya shreeniwaas
Date : March 29 2020, 07:55 AM
hop of those help? Generally speaking, you should create instance methods when you need code that operates on a specific instance of an object. You create a class method when you need to do something that involves that class in general but probably doesn't operate on any specific objects of that class.
In practice, you will find that nearly all of your methods should be instance methods. Just take a look at any existing Objective-C class like NSString, NSArray, UIView, etc. and you'll see that the vast majority of their methods are instance methods. The most common use of class methods (again, look at the classes I mentioned) are for convenience constructors that return autorelease objects, or singleton accessors.

Objective C delegates and class methods vs instance methods


By : Taufik
Date : March 29 2020, 07:55 AM
help you fix your problem I tried both methods i.e. using class and instance methods. Any of them will do, though to follow the proper delegation pattern I believe using instance methods is more appropriate.

Objective-c: Difference between using properties via dot notation and methods?


By : Anto Peter
Date : March 29 2020, 07:55 AM
This might help you
Is the dot notation only syntactic sugar for message sending and the code is compiled exactly the same?

Grouping class methods using dot notation in Python


By : AdelBaz
Date : March 29 2020, 07:55 AM
will be helpful for those in need This is an example of Fluent API design, which uses method chaining in it's core. The implementation idea of this in Python is to return the instance from each method after doing what they are supposed to do.
Here is a naive example:
code :
In [1]: class Fluent: 
   ...:     def __init__(self, num): 
   ...:         self.num = num 
   ...:     def add_two(self): 
   ...:         self.num += 2 
   ...:         return self  # this allows us for chaining
   ...:     def result(self): 
   ...:         return self.num 
   ...:                                                                                                                                                                                                     

In [2]: f = Fluent(10)                                                                                                                                                                                      

In [3]: f.add_two().result()                                                                                                                                                                                
Out[3]: 12
f.add_two.result()
In [4]: class Fluent: 
   ...:     def __init__(self, num): 
   ...:         self.num = num
   ...:     @property
   ...:     def add_two(self): 
   ...:         self.num += 2 
   ...:         return self  # this allows us for chaining
   ...:     def result(self): 
   ...:         return self.num 
   ...:                                                                                                                                                                                                     

In [5]: f = Fluent(10)                                                                                                                                                                                      

In [6]: f.add_two.result()                                                                                                                                                                                
Out[6]: 12
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