Objective-C Language Declare class method and instance method How to declare class method and instance method.
Example
instance methods use an instance of a class.
@interface MyTestClass : NSObject
- (void)testInstanceMethod;
@end
They could then be used like so:
MyTestClass *object = [[MyTestClass alloc] init];
[object testInstanceMethod];
Class method can be used with just the class name.
@interface MyClass : NSObject
+ (void)aClassMethod;
@end
They could then be used like so:
[MyClass aClassMethod];
class methods are the convenience methods on many Foundation classes like [NSString's +stringWithFormat:] or NSArray's +arrayWithArray
