I am using the following code to show the pointer like triangle view as shown in image below.
UIView *triangleView = [[UIView alloc] initWithFrame:CGRectMake(70.0f,58.0f, self->_createAccountView.frame.size.width ,20.0f)];
UIBezierPath* trianglePath = [UIBezierPath bezierPath];
[trianglePath moveToPoint:CGPointMake(0, 0)];
[trianglePath addLineToPoint:CGPointMake((self->_createAccountView.frame.size.width/7) -8, (self->_createAccountView.frame.size.height/4))];
[trianglePath addLineToPoint:CGPointMake((self->_createAccountView.frame.size.width/5) , 0)];
[trianglePath closePath];
trianglePath.lineJoinStyle = kCGLineJoinRound;
CAShapeLayer *triangleMaskLayer = [CAShapeLayer layer];
[triangleMaskLayer setPath:trianglePath.CGPath];
triangleView.backgroundColor = [UIColor colorWithRed:1.00 green:1.00 blue:1.00 alpha:1.0];
triangleView.layer.mask = triangleMaskLayer;
[self->_AccountView addSubview:triangleView];
This works fine but I want the pointing edge of the triangle view to be rounded. How can make it rounded? Any help is appreciated!
Change the lineJoin to kCALineJoinRound.
triangleMaskLayer.lineJoin = kCALineJoinRound;
Related
I'm making mask using UIBezierPath and CAShapeLayer with this code:
- (void)createPath {
UIBezierPath *path = [[UIBezierPath alloc] init];
[path moveToPoint:CGPointMake(0, 0)];
[path addLineToPoint:CGPointMake(100, 100)];
[path moveToPoint:CGPointMake(100, 100)];
[path addLineToPoint:CGPointMake(0, 100)];
[path moveToPoint:CGPointMake(0, 100)];
[path addLineToPoint:CGPointMake(0, 0)];
[path closePath];
CAShapeLayer *layer = [CAShapeLayer new];
layer.frame = self.contentView.bounds;
layer.path = path.CGPath;
self.contentView.layer.mask = layer;
}
But instead of masking my contentView disappears completely. I tried to look at path in debugger and it looks exactly as I want it to look.
When using the layer.mask, the first is to get the right path. You don't need to move to a new point every time. By that way, your path is made of three or four subpaths which can not be closed to form a right path.
The second is trying to use in the View class itself, not to call for other subviews, like contentView. Because you may not know when to call it in subviews. Run the following in a UIView subclass, like in a UITableViewCell (awake from nib). You can get what I mean. If you really want to use contentView, just find the right position to put your layer code. like override setNeedLayout, etc.
- (void)awakeFromNib {
[super awakeFromNib];
// Initialization code
[self createPath];
}
- (void)createPath {
UIBezierPath *path = [[UIBezierPath alloc] init];
[path moveToPoint:CGPointMake(0, 0)];
[path addLineToPoint:CGPointMake(100, 100)];
// [path moveToPoint:CGPointMake(100, 100)];
[path addLineToPoint:CGPointMake(0, 100)];
// [path moveToPoint:CGPointMake(0, 100)];
[path addLineToPoint:CGPointMake(0, 0)];
[path closePath];
CAShapeLayer *layer = [CAShapeLayer new];
layer.frame = self.contentView.bounds;
layer.path = path.CGPath;
self.layer.mask = layer; // not self.contentView.layer.mask;
}
I'm using dr-Charts API to draw bar graphs in my application. I'm drawing the bar graph:
BarChart *barChartView = [[BarChart alloc] initWithFrame:CGRectMake(0, 150, WIDTH(self.view), HEIGHT(self.view) - 600)];
[barChartView setDataSource:self];
[barChartView setDelegate:self];
[barChartView setLegendViewType:LegendTypeHorizontal];
[barChartView setShowCustomMarkerView:TRUE];
[barChartView drawBarGraph];
[barChartView setDrawGridY:TRUE];
[barChartView setDrawGridX:FALSE];
[self.view addSubview:barChartView];
Actually, I want my bar chart rectangles to be rounded rect, something similar to this:
So, In BarChart.m, I started playing with API CAShapeLayer & UIBezierPath:
- (UIBezierPath *)drawBarPathWithStartPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint{
UIBezierPath *path = [UIBezierPath bezierPathWithRect:CGRectMake(startPoint.x, startPoint.y, endPoint.x - startPoint.x, endPoint.y - startPoint.y)];
//UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(startPoint.x, startPoint.y, endPoint.x - startPoint.x, endPoint.y - startPoint.y) byRoundingCorners:UIRectCornerAllCorners cornerRadii:CGSizeMake(10, 10)];
[path stroke];
return path;
}
CAShapeLayer *shapeLayer = [[CAShapeLayer alloc] init];
[shapeLayer setPath:[[self drawBarPathWithStartPoint:endPoint endPoint:startPoint] CGPath]];
[shapeLayer setStrokeColor:[barData.barColor CGColor]];
[shapeLayer setFillColor:[barData.barColor CGColor]];
[shapeLayer setFillRule:kCAFillRuleEvenOdd];
[shapeLayer setLineWidth:0.5f];
[shapeLayer setOpacity:0.7f];
[shapeLayer setShadowRadius:0.0f];
[shapeLayer setShadowColor:[[UIColor clearColor] CGColor]];
[shapeLayer setShadowOpacity:0.0f];
[shapeLayer setValue:[barData.yAxisArray objectAtIndex:i] forKey:#"data"];
After following many answers on StackOverflow, I couldn't succeed.
I tried many answers like shapeLayer.cornerRadius = 10;
UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(startPoint.x, startPoint.y, endPoint.x - startPoint.x, endPoint.y - startPoint.y) byRoundingCorners:UIRectCornerAllCorners cornerRadii:CGSizeMake(10, 10)];
Could you please help.
Try to draw wide line with rounded corners, for example
UIBezierPath *linePath = [UIBezierPath bezierPath];
[linePath moveToPoint:CGPointMake(topX, topY)];
[linePath addLineToPoint:CGPointMake(bottomX, bottomY)];
CAShapeLayer *line = [CAShapeLayer layer];
line.frame = some_frame;
line.lineCap = kCALineCapRound;
line.path = linePath.CGPath;
line.fillColor = nil;
line.lineWidth = 6.0;
line.cornerRadius = 3.0;
line.opacity = 1.0;
line.strokeColor = [UIColor greenColor].CGColor;
[line setMasksToBounds:YES];
I need help to draw trapezoid shapes in iOS.
I am using the following code to draw the Pink shape, but it is not working:
UIBezierPath* trianglePath = [UIBezierPath bezierPath];
[trianglePath moveToPoint:CGPointMake(0, 0)];
[trianglePath addLineToPoint:CGPointMake(topView.frame.size.width, topView.frame.size.height/2)];
[trianglePath addLineToPoint:CGPointMake(100, topView.frame.size.height/2)];
CAShapeLayer *triangleMaskLayer = [CAShapeLayer layer];
[triangleMaskLayer setPath:trianglePath.CGPath];
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0,topView.frame.size.height-150, 200, 150)];
view.layer.mask = triangleMaskLayer;
[self.view addSubview:view];
How can I draw the pink-colored shape?
-(void)TriangularPinkView{
UIBezierPath *path = [UIBezierPath bezierPath];
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
shapeLayer.strokeColor = [[UIColor redColor] CGColor];
shapeLayer.lineWidth = 0.5;
CGPoint start = CGPointMake(CGRectGetMinX(self.pinkView.frame), CGRectGetMidY(self.pinkView.frame)+CGRectGetHeight(self.pinkView.frame)*.25);
[path moveToPoint:start];
[path addLineToPoint:CGPointMake(CGRectGetMaxX(self.pinkView.frame), CGRectGetMidY(self.pinkView.frame))];
[path addLineToPoint:CGPointMake(CGRectGetMaxX(self.pinkView.frame), CGRectGetMaxY(self.pinkView.frame))];
[path addLineToPoint:CGPointMake(CGRectGetMinX(self.pinkView.frame), CGRectGetMaxY(self.pinkView.frame))];
shapeLayer.path = [path CGPath];
// shapeLayer.fillRule = kCAFillRuleEvenOdd;
shapeLayer.fillColor = [[UIColor redColor] CGColor];
[self.view.layer addSublayer:shapeLayer];
}
Can anybody help me to get frame of CAShapeLayer which is been added in UIImageView as a SubLayer?
Following is my code for the same:
CAShapeLayer *shapeLayer = [[CAShapeLayer alloc] init];
shapeLayer.fillColor = [[UIColor redColor] colorWithAlphaComponent:0.15].CGColor;
shapeLayer.strokeColor = [UIColor redColor].CGColor;
shapeLayer.lineWidth = 3.0;
shapeLayer.zPosition = 1;
[_imgBackground.layer insertSublayer:shapeLayer atIndex:1];
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(50, 50)]; // left top point of rack
[path addLineToPoint:CGPointMake(100, 50)]; // right top point of rack
[path addLineToPoint:CGPointMake(100, 100)]; // right bottom point of rack
[path addLineToPoint:CGPointMake(50, 100)]; // left bottom point of rack
[path closePath]; // closing rectangle/path
shapeLayer.path = path.CGPath;
As I know we can get frame from the following line:
CGRect bounds = CGPathGetBoundingBox(shapeLayer.path);
But it only returns frame according to self.view
I want its frame according to UIImageView.
Thanks in advance.
Well I got the answer from James's comment. Following line saved my day:
CGRect bounds = [self.view convertRect:CGPathGetBoundingBox(shapeLayer.path) toView:_imgBackground];
from this reference.
I read this post Draw dotted (not dashed!) line, with IBDesignable in 2017 about drawing a dotted line (rather than a dashed line). However, I am not too familiar with graphics generally and I'm wondering how I can do this with a CALayer (so I don't have to do the whole get current graphics context thing).
I am trying to produce a dotted line that looks like this (the white part, ignore the background):
Here's the code I have working to produce a dotted line:
CAShapeLayer *shapelayer = [CAShapeLayer layer];
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:startPoint];
[path addLineToPoint:endPoint];
[path setLineCapStyle:kCGLineCapRound];
UIColor *fill = [UIColor whiteColor];
shapelayer.strokeStart = 0.0;
shapelayer.strokeColor = fill.CGColor;
shapelayer.lineWidth = 4.0;
shapelayer.lineJoin = kCALineJoinRound;
shapelayer.lineDashPattern = [NSArray arrayWithObjects:[NSNumber numberWithInt:4],[NSNumber numberWithInt:6 ], nil];
shapelayer.path = path.CGPath;
return shapelayer;
How can I mirror the code in the SO post I referenced but continue using a CALayer?
I tried modifying the code from that post like so:
UIBezierPath * path = [[UIBezierPath alloc] init];
[path moveToPoint:startPoint];
[path addLineToPoint:endPoint];
[path setLineWidth:8.0];
CGFloat dashes[] = { path.lineWidth, path.lineWidth * 2 };
[path setLineDash:dashes count:2 phase:0];
[path setLineCapStyle:kCGLineCapRound];
[path stroke];
CAShapeLayer *returnLayer = [CAShapeLayer layer];
returnLayer.path = path.CGPath;
return returnLayer;
However, this ends up drawing nothing.
I hope this will help you.
CAShapeLayer *circleLayer = [CAShapeLayer layer];
[circleLayer setPath:[[UIBezierPath bezierPathWithOvalInRect:CGRectMake(50, 50, 100, 100)] CGPath]];
circleLayer.lineWidth = 2.0;
[circleLayer setStrokeColor:[[UIColor redColor] CGColor]];
[circleLayer setFillColor:[[UIColor clearColor] CGColor]];
circleLayer.lineJoin = kCALineJoinRound;
circleLayer.lineDashPattern = [NSArray arrayWithObjects:[NSNumber numberWithInt:2],[NSNumber numberWithInt:3 ], nil];
// self.bgImage is parentView
[[self.bgImage layer] addSublayer:circleLayer];
self.bgImage.layer.borderWidth = 1.0f;
self.bgImage.layer.borderColor = [[UIColor blueColor]CGColor];
I have attached the output of the image
In my case I had to set the lineCapStyle rather than the lineJoinStyle.