Difference between revisions of "Objective-C Sandbox"

Revision as of 03:55, 2 March 2013

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);