First you need some output for debugging in the Debugger Console, this is done with NSLog:
( By the way, A string is preceeded by @ )
NSLog(@"read the name");//simple string output in Debugger window.
Where to find this window: here, when you are running.....: (the gdb black window button...)
Now you can see what your code is doing:
NSLog(@"look at this number %d", intNumber); //int
NSLog(@"touched loc %f %f", currentTouch.x , currentTouch.y ); //float
showing a string in NSLog:
done by using stringByAppendingString:
NSLog([@"see how the name of the player is changed in setNamePlayer :" stringByAppendingString:@"new name of player"]);
mind the function clammers: [ and ] ..... [ ... stringByAppendingString: ... ], this gives a String, because this comes from the class NSString.
simple numbers: (no pointers needed)
int, float, bool
int myInt = 9;
float myFloat = 9.123;
bool myBool = false;
Declaration: int (float, bool)
in the header:
@interface ScoreObject : NSObject {
int playingFieldNumber;
}
@property int playingFieldNumber;
in the source:
#import "ScoreObject.h"
@implementation ScoreObject
@synthesize playingFieldNumber;
Number Objects: (always pointers in Objective C)
making an Number Object (for instance needed populating NSArray or NSMutableArray
NSNumber* myNumberObject = [NSNumber numberWithInt: 99 ];
NSNumber* myNumberObject = [NSNumber numberWithFloat: 99.99 ];
getting the value back from an NSNumber Object:
int myIntValue = (int)[myNumberObject intValue];
float myFloatValue = (float)[myNumberObject floatValue];
bool myBoolValue = (bool)[myNumberObject boolValue];
using this in NSLog:
NSLog([@"look at this number %d", (int)[myNumberObject intValue]);
Declaration: objects like NSNumber, NSArray
in the header
@interface ScoreObject : NSObject {
NSMutableArray *fieldNameArray;
}
@property (nonatomic, retain) NSMutableArray *fieldNameArray;
in the source:
@implementation ScoreObject
@synthesize fieldNameArray;
Last thing about NSLog... how to get an object out?
NSLog( @"this is my object: %@", myNSNumber );
of course you do not get a int float bool, like this, but an object name.]]>
