I'm drawing chart and i want to add buttons on calayers.This red and blue color shapes are CAShaperlayer. i have used uibezier path to draw those layers.
Below is one of the good library to solve your problem.
You can download the source code from here.
Check into appetize.io
Related
I was wondering if it was possible to change the color of a UIBezierPath strokeColor while its animating. For instance, if it goes past a certain angle like 45 deg, it changes from green to orange, and if it goes past 66 deg it goes from orange to red.
Somebody else suggested using a "gradual" (gradient) layer. If you can create a gradient that meets your needs then that would work.
You could do just about anything you want by creating an image that contains the colors you want, and then installing a shape layer as a mask layer to that image's layer, and animating changes to the path installed in the shape layer.
I've used a technique like that to create various sorts of "wipe" transitions that reveal an image. See the thread below for info and working code showing how to create a "Clock wipe", which is almost exactly what you need:
How do you achieve a "clock wipe"/ radial wipe effect in iOS?
I am making a pie chart where each sector is a separate button with a background image, but UIButton has a rectangular shape and all the buttons overlap. Is there a way to make a UIButton the exact shape of an irregular image (in Swift) so this does not happen?
Any help would be appreciated
You can use UIBezierPath or CGPath to define your pie chart sections and use their containsPoint: or CGPathContainsPoint to detect touch
As I'm concerned, may be the CAShapeLayer is better way to achieve the pie chart. By doing that, you can use
[layer hitTest:]
method to deal with the touch action.
How to draw a dynamic circle in Objective-C
I have to draw 2 circles first outer circle radius is fixed shown in figure filled with green Color (A).
The other circle is dynamic based on some radius(B).
How can I achieve this.
Subclass an UIView and then override its drawRect method. Inside it use some NSBezierPaths and NSColor settings to make your drawings.
drawRect:
https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIView_Class/#//apple_ref/occ/instm/UIView/drawRect:
Cocoa drawings
https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/CocoaDrawingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40003290-CH201-SW1
Bezier paths
https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/CocoaDrawingGuide/Paths/Paths.html
Colors
https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/CocoaDrawingGuide/Color/Color.html#//apple_ref/doc/uid/TP40003290-CH205-BAJDFIFE
This might help you,
Download sketch from apple. http://developer.apple.com/library/mac/#samplecode/Sketch
see more
stackoverflow link
Hello: Currently in my project, I'm using OBShapedButton to process touches on a lot of objects that overlap (it's a map with each territory its own separate object). Basically, this library prevents a touch from being processed on a transparent point on the given view.
I'm attempting to add a border effect to just the edges of the opaque part of the UIImage (and adding a semi-transparent overlay above that). Something to the effect of this:
Which can be simplified to this (example of one image):
I am currently using MGImageUtilities to color in the opaque parts of territories using this line:
[territory setImage:[[territory image] imageTintedWithColor:tint]];
The problem is that I'm not sure how to just color the borders (which can be any shape). I've looked at this link already, but haven't been able to come up with anything.
Thanks in advance for the help!
Terribly hacky, but use MGImageUtilities' UIImage+ProportionalFill with scale resizing to create a slightly larger image, UIImage+Tint to red, and stack below.
The library you are using doesn't actually specify a shape layer. It uses alpha values from the PNGs that you give it.
Could you use a different 'highlighted' or 'selected' PNG that adds the border effect you are looking for?
Otherwise, it you will have to generate a UIBezierPath from your PNG image, which sounds like a very computationally intensive operation. At that point, I might question whether this library meets your needs.
I want to fill each and every part with different colours like circle with other colour and each leave with different colour and stick with different colours. I have bunch of colours. You can fidn similar apps like Toonia Color book on apple app store...
I am unable to get bounds of particular part in image.
I searched a whole day before writing this question. Every one is saying just look for flood fill and Quick Fill algorithms but i am not able to solve this problem.
In Toonia Colorbook this is done using vector graphics and masks. Every shape is described as a bezier curve that masks a drawing layer.
check out CAShapeLayer and CALayer for further details