Ich besitze eine App, in der ich eine Ansicht skizziere.

Bisher hat es einwandfrei funktioniert, bis ich es installiert habeios7.

Meine App verwendet die Methode "Berührungen verschieben", um die Änderung einer Bewegung zu erkennen. Wenn ich jedoch eine Linie zeichne, wird die Methode touches aufgerufen, die Linie wird jedoch erst aktualisiert, wenn ich mit touch endetios7.

Es gibt also eine leichte Verzögerung beim Zeichnen.

Es funktioniert gut aufios6 und weiterios7 simulator aber wenn ich es auf einem realen testeios7 Gerät gibt es eine Verzögerung im Zeichnungsalgorithmus.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
if (!isImageSelection) {

            mouseSwiped = NO;
            UITouch *touch = [touches anyObject];

            if ( [touch view] != baseview) {

                lastPoint2 = [touch locationInView:self.viewDrawing2];
            }
        }
    }

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
 if (!isImageSelection) {

          //  NSLog(@"in image selection==%d touch moved   ",isImageSelection );

            mouseSwiped = YES;

            UITouch *touch = [touches anyObject];
            // if (([touch view] != btnInkColor) || ([touch view] != btnPenSize)  || ([touch view] != baseview)) {
            if ( [touch view] != baseview) {

                CGPoint currentPoint = [touch locationInView:self.viewDrawing];



                if(isEraser) {
                    // [[NSUserDefaults standardUserDefaults] floatForKey:@"strokeValue"];
                    UIGraphicsBeginImageContext(self.viewDrawing.frame.size);
                    [imgDrawing.image drawInRect:CGRectMake(0, 0, self.viewDrawing.frame.size.width, self.viewDrawing.frame.size.height)];
                    CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
                    CGContextSetLineWidth(UIGraphicsGetCurrentContext(), stroke);
                    //uncommented by prerak
                        CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), red, green, blue, 1.0);

                    CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeClear);
                    CGContextBeginPath(UIGraphicsGetCurrentContext());
                    CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
                    CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y);
                    CGContextStrokePath(UIGraphicsGetCurrentContext());
                    imgDrawing.image = UIGraphicsGetImageFromCurrentImageContext();
                    UIGraphicsEndImageContext();
                } else {
                    float strokeT= [[NSUserDefaults standardUserDefaults] floatForKey:@"strokeValue"];
                    //   NSLog(@"strokeT=%f",strokeT);
                    UIGraphicsBeginImageContext(self.viewDrawing.frame.size);
                    [imgDrawing.image drawInRect:CGRectMake(0, 0, self.viewDrawing.frame.size.width, self.viewDrawing.frame.size.height)];
                    //   NSLog(@"STROKE %f",stroke);
                    CGContextSetLineWidth(UIGraphicsGetCurrentContext(), strokeT);
                    CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeCopy);
                    float redT=[[NSUserDefaults standardUserDefaults] floatForKey:@"redvalue"];
                    float greenT= [[NSUserDefaults standardUserDefaults] floatForKey:@"greenvalue"];
                    float blueT= [[NSUserDefaults standardUserDefaults] floatForKey:@"bluevalue"];

                    //   NSLog(@"red=%f",redT);
                    //   NSLog(@"green=%f",greenT);
                    //   NSLog(@"blue=%f",blueT);

                    CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), redT, greenT, blueT, 1.0);
                    CGContextSetRGBFillColor(UIGraphicsGetCurrentContext(), redT, greenT, blueT, 1.0);

                    CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
                    CGContextSetLineJoin(UIGraphicsGetCurrentContext(), kCGLineJoinRound);
                    CGContextBeginPath(UIGraphicsGetCurrentContext());
                    CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
                    CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y);
                    CGContextStrokePath(UIGraphicsGetCurrentContext());
                    imgDrawing.image = UIGraphicsGetImageFromCurrentImageContext();
                    UIGraphicsEndImageContext();
                }
                lastPoint = currentPoint;
            }
        }
    }

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
  UITouch *touch = [touches anyObject];


        //if (([touch view] != btnInkColor) || ([touch view] != btnPenSize) || ([touch view] != baseview)) {
        if ( [touch view] != baseview) {

            if (!isImageSelection) {

                if(!mouseSwiped) {
                    if (isEraser) {
                        UIGraphicsBeginImageContext(self.viewDrawing.frame.size);
                        [imgDrawing.image drawInRect:CGRectMake(0, 0, self.viewDrawing.frame.size.width, self.viewDrawing.frame.size.height)];
                        CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
                        CGContextSetLineWidth(UIGraphicsGetCurrentContext(), stroke);
                        // CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), red, green, blue, 1.0);
                        CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeClear);
                        CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
                        CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
                        CGContextStrokePath(UIGraphicsGetCurrentContext());
                        CGContextFlush(UIGraphicsGetCurrentContext());
                        imgDrawing.image = UIGraphicsGetImageFromCurrentImageContext();
                        UIGraphicsEndImageContext();
                    } else {
                        UIGraphicsBeginImageContext(self.viewDrawing.frame.size);
                        [imgDrawing.image drawInRect:CGRectMake(0, 0, self.viewDrawing.frame.size.width, self.viewDrawing.frame.size.height)];

                        CGContextSetLineWidth(UIGraphicsGetCurrentContext(), stroke);
                        CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeCopy);

                        CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), red, green, blue, 1.0);
                        CGContextSetRGBFillColor(UIGraphicsGetCurrentContext(), red, green, blue, 1.0);

                        CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
                        CGContextSetLineJoin(UIGraphicsGetCurrentContext(), kCGLineJoinRound);
                        CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
                        CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
                        CGContextStrokePath(UIGraphicsGetCurrentContext());
                        CGContextFlush(UIGraphicsGetCurrentContext());
                        imgDrawing.image = UIGraphicsGetImageFromCurrentImageContext();
                        UIGraphicsEndImageContext();
                    }
                }
            }
        }
    }
}

Wie kann ich das lösen?