What I am doing is, I've an imageview that displays an image and above it I've a overlay view where I draw the annotations. It's working fine on other devices but in iPhone 12 overlays is not displayed!Tried using CATiledLayer with no luck! I am just giving the screenshot of iPhone SE & iPhone 12.
This is iPhone SE output
And this is iPhone 12 output:
I am using UIBezierPath to draw the lines! This is how I am drawing the lines:
+(UIBezierPath*) pathForArrowUsingStartPoint:(CGPoint) startPoint endPoint:(CGPoint) endPoint superRect:(CGRect) superRect lineWidth:(double) LINE_WIDTH
arrowSize:(double) ARROW_SIZE arrowTipSize:(double) ARROW_TIP_DIST
{
UIBezierPath* bp = [UIBezierPath bezierPath];
CGPoint transLatedEndPoint = [Annotation convertBetweenUIViewCoordAndXYCoord:endPoint inRect:superRect];
CGPoint transLatedStartPoint = [Annotation convertBetweenUIViewCoordAndXYCoord:startPoint inRect:superRect];
CGFloat lineAngle = [Annotation angleBetweenPoint1:transLatedStartPoint Point2:transLatedEndPoint];
//calculate the rect to draw
CGPoint p0 ;
p0.x = transLatedEndPoint.x + LINE_WIDTH * cosf(lineAngle + M_PI/2);
p0.y = transLatedEndPoint.y + LINE_WIDTH * sinf(lineAngle + M_PI/2);
p0 = [Annotation convertBetweenUIViewCoordAndXYCoord:p0 inRect:superRect];
CGPoint p1;
p1.x = transLatedEndPoint.x + LINE_WIDTH * cosf(lineAngle - M_PI/2);
p1.y = transLatedEndPoint.y + LINE_WIDTH * sinf(lineAngle - M_PI/2);
p1 = [Annotation convertBetweenUIViewCoordAndXYCoord:p1 inRect:superRect];
CGPoint p2 ;
p2.x = transLatedStartPoint.x - LINE_WIDTH * cosf(lineAngle + M_PI/2);
p2.y = transLatedStartPoint.y - LINE_WIDTH * sinf(lineAngle + M_PI/2);
p2 = [Annotation convertBetweenUIViewCoordAndXYCoord:p2 inRect:superRect];
CGPoint p3;
p3.x = transLatedStartPoint.x - LINE_WIDTH * cosf(lineAngle - M_PI/2);
p3.y = transLatedStartPoint.y - LINE_WIDTH * sinf(lineAngle - M_PI/2);
p3 = [Annotation convertBetweenUIViewCoordAndXYCoord:p3 inRect:superRect];
// now drawing arrow head using triangle
CGPoint arrow0P0;
arrow0P0.x = transLatedEndPoint.x - ARROW_SIZE * cosf(lineAngle - M_PI/4);
arrow0P0.y = transLatedEndPoint.y - ARROW_SIZE * sinf(lineAngle - M_PI/4);
arrow0P0 = [Annotation convertBetweenUIViewCoordAndXYCoord:arrow0P0 inRect:superRect];
CGPoint arrow0P1;
arrow0P1.x = transLatedEndPoint.x - ARROW_SIZE * cosf(lineAngle + M_PI/4);
arrow0P1.y = transLatedEndPoint.y - ARROW_SIZE * sinf(lineAngle + M_PI/4);
arrow0P1 = [Annotation convertBetweenUIViewCoordAndXYCoord:arrow0P1 inRect:superRect];
CGPoint arrow0Tip;
arrow0Tip.x = transLatedEndPoint.x + ARROW_TIP_DIST * cosf(lineAngle);
arrow0Tip.y = transLatedEndPoint.y + ARROW_TIP_DIST * sinf(lineAngle);
arrow0Tip = [Annotation convertBetweenUIViewCoordAndXYCoord:arrow0Tip inRect:superRect];
[bp moveToPoint:p0];
[bp addLineToPoint:p1];
[bp addLineToPoint:p2];
[bp addLineToPoint:p3];
[bp closePath];
//arrows
[bp moveToPoint:arrow0P0];
[bp addLineToPoint:arrow0Tip];
[bp addLineToPoint:arrow0P1];
[bp addLineToPoint:arrow0P0];
[bp closePath];
return bp;
}
Newer device has scale factor of 3. For large image a canvas that big was throwing the error and my canvas was not visible. Just changing the scale factor of my drawing canvas does the trick.
self.drawingCanvas.contentScaleFactor = 2.0;