I working on a drawing app, and I am able to draw with my finger touch, now I am trying to implement, clear ,undo and redo functionality,In my viewcontroller ,I have two IBAction methods for "clearAll" and "Undo", I have created a custom class called drawing.h and .m where I have written functions for handling touch events,below are my functions..
- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
tempArray = [[NSMutableArray alloc]init];
if ([touch tapCount] == 2)
{
self.image = nil;
}
return;
}
currentlocation.location = [touch locationInView:self];
}
- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
PointLocation *currentLocation1 = [[PointLocation alloc] init];
currentLocation1.Location = [touch locationInView:self];
UIGraphicsBeginImageContext(self.frame.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
[self.image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
CGContextSetLineCap(ctx, kCGLineCapRound);
CGContextSetLineWidth(ctx, 2.0);
CGContextSetRGBStrokeColor(ctx, 1.0, 0.0, 0.0, 1.0);
CGContextBeginPath(ctx);
CGContextMoveToPoint(ctx, currentlocation.Location.x, currentlocation.Location.y);
CGContextAddLineToPoint(ctx, currentLocation1.Location.x, currentLocation1.Location.y);
CGContextStrokePath(ctx);
CGContextSetFlatness(ctx, 0.1);
CGContextSetAllowsAntialiasing(ctx, true);
self.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
currentlocation = currentLocation1;
**[tempArray addObject:[NSArray arrayWithObjects:currentlocation,currentLocation1, nil]];
NSLog(#"%i",[tempArray count]);**
}
- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
PointLocation *currentLocation1 = [[PointLocation alloc] init];
currentLocation1.Location = [touch locationInView:self];
UIGraphicsBeginImageContext(self.frame.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
[self.image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
CGContextSetLineCap(ctx, kCGLineCapRound);
CGContextSetLineWidth(ctx, 2.0);
CGContextSetRGBStrokeColor(ctx, 1.0, 0.0, 0.0, 1.0);
CGContextBeginPath(ctx);
CGContextMoveToPoint(ctx, currentlocation.Location.x, currentlocation.Location.y);
CGContextAddLineToPoint(ctx, currentLocation1.Location.x, currentLocation1.Location.y);
CGContextStrokePath(ctx);
self.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
currentlocation = currentLocation1;
**[tempArray addObject:[NSArray arrayWithObjects:currentlocation,currentLocation1, nil]];
NSLog(#"%i",[tempArray count]);**
}
In the above code I am adding all the CGPoints to an Array,the array is filling with the points, now how shall I perform the undo functionality?
So friends please help me out..
Regards
Ranjit
Related
I want to draw lines on a view, here's my code.
- (void)drawRect:(CGRect)rect {
[self.image drawInRect:self.bounds];
}
- (void)drawNewLine {
UIGraphicsBeginImageContext(self.bounds.size);
[self.image drawInRect:self.bounds];
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
CGContextSetRGBStrokeColor(ctx, 0.51, 0.85, 0.81, 1);
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 4.0);
CGContextBeginPath(ctx);
CGPoint mid1 = midPoint(previousPoint1, previousPoint2);
CGPoint mid2 = midPoint(currentPoint, previousPoint1);
CGContextMoveToPoint(ctx, mid1.x, mid1.y);
CGContextAddQuadCurveToPoint(ctx, previousPoint1.x, previousPoint1.y, mid2.x, mid2.y);
CGContextStrokePath(UIGraphicsGetCurrentContext());
self.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[self setNeedsDisplay];
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[recognizer resetTouches];
[recognizer addTouches:touches fromView:self];
self.image = nil;
previousPoint1 = previousPoint2 = currentPoint = [[touches anyObject] locationInView:self];
[self setNeedsDisplay];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
previousPoint2 = previousPoint1;
previousPoint1 = currentPoint;
currentPoint = [[touches anyObject] locationInView:self];
[self drawNewLine];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[self drawNewLine];
[self processGestureData];
}
It worked fine on other devices except iPhone plus, on 6/6s/7 plus, you can see the clear lag. Can someone please tell me where I did wrong. Thanks a lot.
Here's my app. CallHoney
In my xcode project, the user draws an object manually. So for example they can draw a apple or triangle.
I need to save I guess the coordinates or the line path of what they draw.
How can I store the line path or re-create the image that the user has drawn. I don't want to save the image, but I want to learn from the image the user drew by knowing the specific line path?
Here is the code
.h
int mouseMoved;
BOOL mouseSwiped;
CGPoint lastPoint;
UIImageView *drawImage;
viewdidload {
drawImage = [[UIImageView alloc] initWithImage:nil];
drawImage.frame = self.view.frame;
[self.view addSubview:drawImage];
self.view.backgroundColor = [UIColor lightGrayColor];
mouseMoved = 0;
}
.m
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
BOOL mouseSwiped = NO;
UITouch *touch = [touches anyObject];
if ([touch tapCount] == 2) {
drawImage.image = nil;
return;
}
lastPoint = [touch locationInView:self.view];
lastPoint.y -= 20;
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
mouseSwiped = YES;
UITouch *touch = [touches anyObject];
CGPoint currentPoint = [touch locationInView:self.view];
currentPoint.y -= 20;
UIGraphicsBeginImageContext(self.view.frame.size);
[drawImage.image drawInRect:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 5.0);
CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 1.0, 0.0, 0.0, 1.0);
CGContextBeginPath(UIGraphicsGetCurrentContext());
CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y);
CGContextStrokePath(UIGraphicsGetCurrentContext());
drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
lastPoint = currentPoint;
mouseMoved++;
if (mouseMoved == 10) {
mouseMoved = 0;
}
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
if ([touch tapCount] == 2) {
drawImage.image = nil;
return;
}
_startPoint = [touch locationInView:self.view];
if(!mouseSwiped) {
UIGraphicsBeginImageContext(self.view.frame.size);
[drawImage.image drawInRect:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 5.0);
CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 1.0, 0.0, 0.0, 1.0);
CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
CGContextStrokePath(UIGraphicsGetCurrentContext());
CGContextFlush(UIGraphicsGetCurrentContext());
drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
}
-(void)digitalSignatureCalled{
//viewSign.backgroundColor = [UIColor lightGrayColor];
//create a frame for our signature capture based on whats remaining
imageFrame = CGRectMake(0, 50, 500, 450);
//allocate an image view and add to the main view
mySignatureImage = [[UIImageView alloc] initWithImage:nil];
mySignatureImage.frame = imageFrame;
mySignatureImage.backgroundColor = [UIColor whiteColor];
[viewSign addSubview:mySignatureImage];
}
//when one or more fingers touch down in a view or window
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
//did our finger moved yet?
fingerMoved = NO;
UITouch *touch = [touches anyObject];
//just clear the image if the user tapped twice on the screen
if ([touch tapCount] == 2) {
mySignatureImage.image = nil;
return;
}
//we need 3 points of contact to make our signature smooth using quadratic bezier curve
currentPoint = [touch locationInView:mySignatureImage];
lastContactPoint1 = [touch previousLocationInView:mySignatureImage];
lastContactPoint2 = [touch previousLocationInView:mySignatureImage];
}
//when one or more fingers associated with an event move within a view or window
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
//well its obvious that our finger moved on the screen
fingerMoved = YES;
UITouch *touch = [touches anyObject];
//save previous contact locations
lastContactPoint2 = lastContactPoint1;
lastContactPoint1 = [touch previousLocationInView:mySignatureImage];
//save current location
currentPoint = [touch locationInView:mySignatureImage];
//find mid points to be used for quadratic bezier curve
CGPoint midPoint1 = [self midPoint:lastContactPoint1 withPoint:lastContactPoint2];
CGPoint midPoint2 = [self midPoint:currentPoint withPoint:lastContactPoint1];
//create a bitmap-based graphics context and makes it the current context
UIGraphicsBeginImageContext(imageFrame.size);
//draw the entire image in the specified rectangle frame
[mySignatureImage.image drawInRect:CGRectMake(0, 0, imageFrame.size.width, imageFrame.size.height)];
//set line cap, width, stroke color and begin path
CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 3.0f);
CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 0.0, 0.0, 0.0, 1.0);
CGContextBeginPath(UIGraphicsGetCurrentContext());
//begin a new new subpath at this point
CGContextMoveToPoint(UIGraphicsGetCurrentContext(), midPoint1.x, midPoint1.y);
//create quadratic Bézier curve from the current point using a control point and an end point
CGContextAddQuadCurveToPoint(UIGraphicsGetCurrentContext(),
lastContactPoint1.x, lastContactPoint1.y, midPoint2.x, midPoint2.y);
//set the miter limit for the joins of connected lines in a graphics context
CGContextSetMiterLimit(UIGraphicsGetCurrentContext(), 2.0);
//paint a line along the current path
CGContextStrokePath(UIGraphicsGetCurrentContext());
//set the image based on the contents of the current bitmap-based graphics context
mySignatureImage.image = UIGraphicsGetImageFromCurrentImageContext();
//remove the current bitmap-based graphics context from the top of the stack
UIGraphicsEndImageContext();
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
//just clear the image if the user tapped twice on the screen
if ([touch tapCount] == 2) {
mySignatureImage.image = nil;
return;
}
//if the finger never moved draw a point
if(!fingerMoved) {
UIGraphicsBeginImageContext(imageFrame.size);
[mySignatureImage.image drawInRect:CGRectMake(0, 0, imageFrame.size.width, imageFrame.size.height)];
CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 3.0f);
CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 0.0, 0.0, 0.0, 1.0);
CGContextMoveToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y);
CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y);
CGContextStrokePath(UIGraphicsGetCurrentContext());
CGContextFlush(UIGraphicsGetCurrentContext());
mySignatureImage.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
}
//calculate midpoint between two points
- (CGPoint) midPoint:(CGPoint )p0 withPoint: (CGPoint) p1 {
return (CGPoint) {
(p0.x + p1.x) / 2.0,
(p0.y + p1.y) / 2.0
};
}
-(void)clickToSave:(id)sender{
//convert image into .png format.
viewNewSign.image = mySignatureImage.image;
if (mySignatureImage.image == nil) {
imgString = #"NoSignature";
}else{
imgString = [self getStringFromImage:mySignatureImage.image];
}
NSLog(#"image saved = %#",imgString);
NSLog(#"image length = %lu",(unsigned long)imgString.length);
viewSign.hidden = TRUE;
scroll.scrollEnabled = YES;
[scroll bringSubviewToFront:viewSign];
}
-(NSString *)getStringFromImage:(UIImage *)image{
if(image){
NSData *dataObj = UIImagePNGRepresentation(image);
//[appDelegate showAlert:#"Data Size" message:[NSString stringWithFormat:#"Data length = %lu",(unsigned long)dataObj.length]];
return [dataObj base64EncodedStringWithOptions:0];
} else {
return #"";
}
}
-(void)clickToClear:(id)sender{
[self digitalSignatureCalled];
}
- (UIImage*)imageWithImage:(UIImage*)image
scaledToSize:(CGSize)newSize;
{
UIGraphicsBeginImageContext( newSize );
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
I am making an application where the user sign an form with their signature (analog, with stylus) and I am having this code:
In .h:
CGPoint lastPoint;
CGPoint movebackTo;
CGPoint currentPoint;
CGPoint location;
NSDate *lastClick;
BOOL mouseSwiped;
UIImageView *drawImage;
And in .m
- (void)viewDidLoad {
NSUserDefaults *preferences = [NSUserDefaults standardUserDefaults];
drawImage.image = [preferences objectForKey:#"drawImageKey"];
drawImage = [[UIImageView alloc] initWithImage:nil];
drawImage.frame = CGRectMake(0, 0, 768, 1024);
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
if ([touch tapCount] == 3) {
drawImage.image = nil;
}
location = [touch locationInView:self.view];
lastClick = [NSDate date];
lastPoint = [touch locationInView:self.view];
lastPoint.y -= 0;
[super touchesBegan: touches withEvent: event];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
mouseSwiped = YES;
UITouch *touch = [touches anyObject];
currentPoint = [touch locationInView:self.view];
UIGraphicsBeginImageContext(CGSizeMake(768, 1024));
[drawImage.image drawInRect:CGRectMake(0, 0, 768, 1024)];
CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 5.0);
CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 0.8, 0.8, 0.8, 1);
CGContextBeginPath(UIGraphicsGetCurrentContext());
CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y);
CGContextStrokePath(UIGraphicsGetCurrentContext());
[drawImage setFrame:CGRectMake(0, 0, 768, 1024)];
drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
lastPoint = currentPoint;
[self.view addSubview:drawImage];
}
The problem is, this works fine if I want to use the WHOLE screen for drawing. But I want to use a specific part of the view as "drawing box. I already tried things like changing the line: [drawImage.image drawInRect:CGRectMake(0, 0, 768, 1024)]; to CGRectMake(58, 623, 240, 143)]; Which is the size and position the box has to be, but this is not working for me.
What happens when i change those kind of things: i can draw in the leftcorner of the view, but the actual lines display in the right box! But the drawing, plus the displaying of the code has to be in the box which is located at: X-58 y-623 and is W240 and H143.
I've searched the whole web for this specific thing but I could not find a good answer for this.
I hope you guys can help me out! It would be appreciated very much!
This is the code and I am receiving the error that: Reference to 'kCGLineCapRound' is ambiguous
- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint currentLocation = [touch locationInView:self];
UIGraphicsBeginImageContext(self.frame.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
[self.image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
CGContextSetLineCap(ctx,kCGLineCapRound);
CGContextSetLineWidth(ctx, 5.0);
CGContextSetRGBStrokeColor(ctx, 0.0, 0.0, 1.0, 1.0);
CGContextBeginPath(ctx);
CGContextMoveToPoint(ctx, location.x, location.y);
CGContextAddLineToPoint(ctx, currentLocation.x, currentLocation.y);
CGContextStrokePath(ctx);
self.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
location = currentLocation;
}
I don't know how to get rid of this error, any help is appreciated!
Thanks in advance!
I think you need to add CoreGraphics.framework to you project.
http://docs.millennialmedia.com/iOS-SDK/iOSAddingFrameworks.html
I have searched a lot an answer for this question, but none of them seem to do exactly what I want. A lot of tutorials show me how to add lines and polygons in code, but not with freehand drawing.
I got a MKMapView with a UIImageView over the map. And I can draw a little on my UIImageView but right after that, the MKMapView is draged and the draw doesn't continue.
I would like to know what have I done wrong ?
Here is my code for the touches events :
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
pointA = [touch locationInView:drawView];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint currentLocation = [touch locationInView:drawView];
UIGraphicsBeginImageContext(drawView.frame.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
[drawView.image drawInRect:CGRectMake(0, 0, drawView.frame.size.width, drawView.frame.size.height)];
CGContextSetLineCap(ctx, kCGLineCapRound);
CGContextSetLineWidth(ctx, 5.0);
CGContextSetRGBStrokeColor(ctx, 1.0, 0.0, 0.0, 1.0);
CGContextBeginPath(ctx);
CGContextMoveToPoint(ctx, pointA.x, pointA.y);
CGContextAddLineToPoint(ctx, currentLocation.x, currentLocation.y);
CGContextStrokePath(ctx);
drawView.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
pointA = currentLocation;
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint currentLocation = [touch locationInView:drawView];
UIGraphicsBeginImageContext(drawView.frame.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
[drawView.image drawInRect:CGRectMake(0, 0, drawView.frame.size.width, drawView.frame.size.height)];
CGContextSetLineCap(ctx, kCGLineCapRound);
CGContextSetLineWidth(ctx, 5.0);
CGContextSetRGBStrokeColor(ctx, 1.0, 0.0, 0.0, 1.0);
CGContextBeginPath(ctx);
CGContextMoveToPoint(ctx, pointA.x, pointA.y);
CGContextAddLineToPoint(ctx, currentLocation.x, currentLocation.y);
CGContextStrokePath(ctx);
drawView.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
pointA = currentLocation;
}
And the code of the button who show the UIImageView :
EDIT : I made this for stoping the interactions with the map :
- (IBAction)modeDraw:(id)sender {
if (drawView.alpha == 0.0) {
drawView.image=nil; //empty for a new draw
drawView.backgroundColor = [UIColor whiteColor];
[UIImageView beginAnimations:nil context:nil];
[UIImageView setAnimationDuration:0.5];
[drawView setAlpha:0.4];
[UIImageView commitAnimations];
myMapView.zoomEnabled = NO;
myMapView.scrollEnabled = NO;
} else {
[UIImageView beginAnimations:nil context:nil];
[UIImageView setAnimationDuration:0.5];
[drawView setAlpha:0.0];
[UIImageView commitAnimations];
myMapView.zoomEnabled = YES;
myMapView.scrollEnabled = YES;
}
}
After doing my draw, I would like to transform this draw into a form (area), that will be put on the map. If you have some indications for me ?
Thank you, and sorry for my bad english.
Here is my code if anyone have the same problem as me and the link that Allan gave me : http://www.apps168.net/post/1460.html :
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
pointA = [touch locationInView:drawView];
pathRef = CGPathCreateMutable();
CGPathMoveToPoint(pathRef, NULL, pointA.x, pointA.y);
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint currentLocation = [touch locationInView:drawView];
CGPoint pastLocation = [touch previousLocationInView:drawView];
UIGraphicsBeginImageContext(drawView.frame.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
[drawView.image drawInRect:CGRectMake(0, 0, drawView.frame.size.width, drawView.frame.size.height)];
CGContextSetLineCap(ctx, kCGLineCapRound);
CGContextSetLineWidth(ctx, 5.0);
CGContextSetRGBStrokeColor(ctx, 0.0, 0.0, 0.0, 1.0);
CGContextBeginPath(ctx);
CGContextStrokePath(ctx);
CGContextMoveToPoint(ctx, pastLocation.x, pastLocation.y);
CGContextAddLineToPoint(ctx, currentLocation.x, currentLocation.y);
CGContextDrawPath(ctx, kCGPathFillStroke);
drawView.image=UIGraphicsGetImageFromCurrentImageContext();
CGPathAddLineToPoint(pathRef, NULL, currentLocation.x, currentLocation.y);
UIGraphicsEndImageContext();
//pointA = currentLocation;
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
CGPathCloseSubpath(pathRef);
NSUInteger count = [array count];
for (NSUInteger i = 0; i < count; i=i+2) {
NSString *lat = [array objectAtIndex: i];
NSString *lgt = [array objectAtIndex: i+1];
CLLocationCoordinate2D pointLoc;
pointLoc.latitude = [lat doubleValue];
pointLoc.longitude = [lgt doubleValue];
locationConverToImage = [myMapView convertCoordinate:pointLoc toPointToView:drawView];
if (CGPathContainsPoint(pathRef, NULL, locationConverToImage, NO)) {
NSLog(#"point in path!");
//sélection de ces points et cacher les autres.
}
}
[UIImageView beginAnimations:nil context:nil];
[UIImageView setAnimationDuration:0.5];
[drawView setAlpha:0.0];
[UIImageView commitAnimations];
myMapView.zoomEnabled = YES;
myMapView.scrollEnabled = YES;
}
Draw my map try this , this is draw map point project