Meet cute and very flexibility library for iOS application for different data view in one circle diagram. ProcessingKit written in Swift and you can write like processing. Powerful pie layer for creating your own pie view. PieLayer provide great animation with simple usage. Flower-shaped chart written in Swift, this repo is a sample project you can build directly on your iPhone. Input Calendars Picker Switch Text. Charts A collection of 37 posts. BSChart is a simple and useful chart library written on Swift.

Interactive Line Graph iOS chart library. ChartView is an example project of using ValueAnimator in custom view drawing.

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• A Beginner's Guide to Bezier Paths and Shape Layers | AppCoda!
• Set up your development project.
• Getting Started.
• Creating Paths and Shapes.

Line and area chart library for iOS. Elegant way to use charts on iOS with CoreCharts. For that reason, I provide you with the following CGFloat extension that performs the conversion from degrees to radians, and that was used it in the last three examples:. A good alternative is using CAShapeLayer objects, which are rendered much faster and you have additional flexibility by using them.

As said in the beginning of this post, a CAShapeLayer is a CALayer subclass, and by creating and using such objects we actually add extra layers to a view. It has several properties that can be set for customising the final outcome of a view, and most of them are animatable, meaning that their values can be changed using animated manners for example, CABasicAnimation. The most easy way to set that path is by creating a bezier path first, and then assigning it to the shape layer object.

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Except for specifying the path, there are other properties that can be set, and usually should be set, too. Also, there are two ways that a shape layer object can be used in the layer of a view: As a sublayer, or as a mask. Lastly, multiple shape layers can be created and added as sublayers to a layer. However, as the top most layers cover those under them, you should carefully size and position them. The simplest thing we could do would be this:.

First off, we call the createRectangle method implemented in the previous part so we draw a rectangular bezier path.

Display point, line, and polygon graphics | ArcGIS for Developers

Remember that the path specified in this method is kept to the path property in our class. Next, we create the shape layer object, which always is as easy as shown above. First we initialise the object, and then we assign the bezier path to its path property. For your information, even though this is the most usual way to add a sublayer, in case you have many of them you could use any of the next methods that the CALayer class provides:.

Preparing the Project

Read more about them here , here and here respectively. By using the lineWidth property we can specify the thickness of the border line. A shape layer can be used in two different ways: As a mask to the default layer of the view, or to be added as a sublayer to it like what we did above. We specify its fill colour, and then we add it as a sublayer to the default layer of the view.

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Nothing difficult, and nothing new here. Obviously, our new shape layer is a nice yellow triangle that sits on top of the view, and the part of the view that is not covered by the fill colour remains dark gray. Then run, and watch:. Well, this is how the mask works. Any part of the view that is not a part of the path is clipped, and the view actually takes the shape of the shape layer that is applied as a mask.

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Furthermore, properties like the fill colour have no effect when the new layer is a mask, so if we want to change the colour of the triangle we need to update the background colour of the view:. Once both paths are specified, are assigned to the two shape layer objects, which in turn are added as sublayers to the layer of the view.

And what if we want to center both layers? Just replace the above line with the next two:. Most of the times, the position property will be good enough to place a shape layer to a different position. According to the documentation, the bounds property expresses the origin and size of the sublayer in its own coordinate system. We move the path to the right and bottom by providing negative values.

Positive values would move the origin of the path to the left and up respectively. When we started discussing about paths in this post, we went through a series of initializers that the UIBezierPath class provides, and we we found out that several types of shapes can be created just by using those initializers.

First of all, notice in the code that we use the shape layer as a mask and not as a sublayer. However, the important part is the path creation. As you see, we have a combination of several lines, of an arc and of a curve. We start drawing from the top-left corner point 0. Watch the given points carefully to see how the path is drawn step by step. The new thing above is the addCurve method, which creates the curve we see on the right side of the shape.

A curved line is something like that:. The above method that adds a line like that expects three arguments: The final point endpoint of the curve, and the two control points that actually define the curvature of the line. Try to change the values of these control points to see how the curve behaves when you modify it. The painful truth, though, is that a lot of mathematics lie behind curves, and you can have your first taste here.

All the rest, are just known stuff. One of those classes-tools that is less-known, or used at least, is the CATextLayer class. Think of this part as a small parenthesis in the post. But sometimes using a label might not work, or it becomes messy if there are multiple sublayers added to the layer of the view that contains the label.



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In that case, the CATextLayer class is what we really need. Creating and using a CATextlayer is just a matter of configuring a bunch of properties according to the way you want text to be shown. See the code, see the results, and then play as much as you want so you get acquainted with it. For more information, take a look at the official documentation.

Getting to the end of this post, I hope that the content of the previous parts was useful and educational for all. Gabriel has been a software developer for about two decades. He has long experience in developing software solutions for various platforms in many programming languages. Since middle he has been developing almost exclusively for iOS. Tutorials consist of the best way to share knowledge with people all over the world. There are three ways to get a context like that: To use a CGContext context. The context needed is provided automatically then.

To create special layers called CAShapeLayer objects. This will create the last line automatically.