Tworzenie zaawansowanych aplikacji w środowisku ios. Wykład 2 Objective-C. Tomasz Idzi

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1 Tworzenie zaawansowanych aplikacji w środowisku ios Wykład 2 Objective-C

2 Agenda Object-Oriented Programming Defining Classes Working with Objects Demo Summary

3 Object-Oriented Programming

4 Object-Oriented Programming

5 Object-Oriented Programming - Inheritance Car Vechicle

6 Object-Oriented Programming - Inheritance NSString NSMutableString NSObject UIResponder UIView UIControl UIButton

7 Defining Classes - Person :

8 Defining Classes - Person : NSString NSString

9 Defining Classes - Property Person : (readonly) NSString (readonly) NSString

10 Defining Classes - Method Declarations - (void)printname;

11 Defining Classes - Method With Parameters - (void)printnamewith:(nsstring*)name;

12 Defining Classes - Method With Parameters - (void)printnamewith:(nsstring*)name { } NSLog(@ Person name is: %@, name);

13 Defining Classes - Class files Person : NSString NSString *lastname; - (void)printname; - Person.m #import Person - (void)printname { NSLog(@ Person name is: %@, self.firstname);

14 Defining Classes - Class Factory Methods Person : NSString NSString *lastname; - (void)printname; - (void)printnamewith:(nsstring*)name; + (void)printfirstname:(nsstring*)fname Person.m + (void)printfirstname:(nsstring*)fname andlastname:(nsstring*)lname; { NSLog(@ Person with first name: %@ and last name: %@, fname, lname); }

15 Working with Objects - initialization Person *newperson = [[Person alloc] init]; Person *newperson = [Person new];

16 Working with Objects - Send and Receive Messages Person *newperson = [Person new]; [newperson printnamewith:@ Lisa ];

17 Working with Objects - Send and Receive Messages #import Person.h [Person printfirstname:@ Lisa andlastname:@ Simpson ];

18 Working with Objects - Send and Receive Messages 1 Current Execution Point [newperson printnamewith:@ Lisa ]; Person Person 2 - (void)printnamewith:(nsstring*)name { d NSLog(@ Person name is: %@, name);

19 Working with Objects - Objects as parameters - (void)printname:(person *)person; - (void)printname:(person *)person { NSLog(@ Person name is: %@, person.firstname); }

20 Working with Objects - return values - (Person*)createPersonWithName:(NSString *)name; - (Person*)createPersonWithName:(NSString *)name { Person *newperson = [Person new]; newperson.firstname = name; return newperson; }

21 Working with Objects - send messages to implementation Person - (void)sayhello { [self printnamewith:@ Lisa ] } - (void)printnamewith:(nsstring *)name { NSLog(@ Person name is: %@, name);

22 Working with Objects - Send and Receive Messages 1 Current Execution Point [newperson sayhello]; 3 Person Person - (void)sayhello { [self printnamewith:@ Lisa ]; } d 2 - (void)printnamewith:(nsstring*)name { NSLog(@ Person name is: %@, name);

23 DEMO

24 Summary type name parm name - (void)printnamewith:(nsstring*)name; return value type parm type