NSMutableArray * naughtytoucharray;
in helloworld .m file
write the below code:-
-(id) init {
if((self = [super init])) {
naughtytoucharray =[[NSMutableArray alloc ] init];
self.isTouchEnabled = YES;
}
return self;
}
-(void) ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [ touches anyObject];
CGPoint new_location = [touch locationInView: [touch view]];
new_location = [[CCDirector sharedDirector] convertToGL:new_location];
CGPoint oldTouchLocation = [touch previousLocationInView:touch.view];
oldTouchLocation = [[CCDirector sharedDirector] convertToGL:oldTouchLocation];
oldTouchLocation = [self convertToNodeSpace:oldTouchLocation];
// add my touches to the naughty touch array
[naughtytoucharray addObject:NSStringFromCGPoint(new_location)];
[naughtytoucharray addObject:NSStringFromCGPoint(oldTouchLocation)];
}
-(void)draw
{
glEnable(GL_LINE_SMOOTH);
for(int i = 0; i < [naughtytoucharray count]; i+=2)
{
CGPoint start = CGPointFromString([naughtytoucharray objectAtIndex:i]);
CGPoint end = CGPointFromString([naughtytoucharray objectAtIndex:i+1]);
ccDrawLine(start, end);
}
}
- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
HelloWorld *line = [HelloWorld node];
[self addChild: line];
}
- (void) dealloc
{
[naughtytoucharray release];
naughtytoucharray= nil;
[super dealloc];
}
now, save and run your project and see when touches moved line will be created.
Posts
5 comments:
hey thanks for the code ,
now can you please tell me now how to delete that line ...
thanks,
Finally got the solution …...
put this in "init"
//*************//
[self schedule:@selector(removePoints:) interval:0.001f];
//*************//
-(void)removePoints:(ccTime *)tm
{
if ([naughtytoucharray count]>0)
{
[naughtytoucharray removeObjectAtIndex:0];
}
}
to get swipe effect you can use
ccDrawPoly or use ccDrawLine 4-5 times continuously ..
in draw function.
Using this u will get swipe effect ... :-)
again thanks for the help "SriNivas".
How to add a uitextfield above the line to show the x difference for example between the 2 points
Thank you for code, works great!
I modified the code to just log the beginning touch point and the last like so (remove the line drawing part):
-(void) ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event{
CGPoint touchLocation = [touch locationInView:[touch view]];
touchLocation = [[CCDirector sharedDirector] convertToGL: touchLocation];
touchLocation = [self convertToNodeSpace:touchLocation];
if([naughtTouchArray count] == 0){
[naughtTouchArray addObject:NSStringFromCGPoint(touchLocation)];
}
}
-(void) ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event
{
CGPoint touchLocation = [touch locationInView: [touch view]];
touchLocation = [[CCDirector sharedDirector] convertToGL: touchLocation];
touchLocation = [self convertToNodeSpace:touchLocation];
[naughtTouchArray addObject:NSStringFromCGPoint(touchLocation)];
for(int i = 0; i < [naughtTouchArray count]; i++){
CCSprite *sp = [CCSprite spriteWithFile:@"Icon-Small.png"];
sp.position = CGPointFromString([naughtTouchArray objectAtIndex:i]);
[self addChild:sp];
}
[naughtTouchArray removeAllObjects];
}
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