Objective-C Sandbox
From Wikicliki
Revision as of 03:55, 2 March 2013 by WikiSysop (talk | contribs) (→The C Comparisions are lost upon me but maybe at a later date this will make more sense)
Contents
A haphazardly conducted class
Hello World
- Open Xcode
- You'll see templates - select single view
- Create new "Hello World" - check local git if you want versioning - select a folder and you will have created the project
- Uncheck storyboards, uncheck include unit tests, select universal
- Check out the views button on top right hand corner
- Nav on left, editor in center, utility on right, debug at bottom
- Uncheck Autolayout:
- Select some tiny box (3rd on bottom row), drag a label to the panel, click on top row 4th button to see the label editing options, type hello world, and then press run.
- Published a hello world screen in the simulator
Traces
inside viewcontroller.m
NSLog(@"trace"); NSDate *dateObj = [[NSDate alloc] init]; NSLog(@"date is %@", dateObj);
- Syntax: MyNotes is the class:
MyNotes *notesObj = [[MyNotes alloc] init]; // pass single argument [notesObj createNewNoteWithTItle:@"First Note"]; // pass multiple arguments [notesObj createNewNoteWithTItle:@"First Note" andDescription:@"I Love ObjectiveC"];
- Instructor is trying to say these are two methods.
@implementation Movie : NSObject -(void)playMovie:(NSString *)movieName; -(void)getMovieRatingForMovie:(NSString *)movieNamethatHasAnActor:(NSString *)actorName; @end
The C Comparisions are lost upon me but maybe at a later date this will make more sense
getMovie //one method getMovieRatingForMovie: thatHasAnActor //another method COMPARED TO C which would be like movieName(char * movieName, char * actorName);