IOS Advanced 13th Day (0414)

0414 the second method of drawing lines, circles and arcs

5 Method Draw Rectangle:

The second method of drawing graphics:

The previous method is to cache the elements to be drawn into the graphics context Cgconteextref, and now the second method is also cached in Cgpath. In fact, the nature of the graphical context is also to create a cgpath inside, the graphical context of all the elements first cached into the Cgpath, The Cgpath is then cached into the Cgcontextref graphics context, and the graphics contexts draw the cached elements to the interface.

Code such as:

Note: Both arc and non-arc have to be manually released Cgpath Pathbreaker objects

Make watermark composite picture save

Code such as:

Head Ring Trim

The code is as follows:

Screen

The code is as follows:

Picture Screen Tile

The small size picture produces the large size picture, the code is as follows:

The Notepad background draws a horizontal line effect with the following code:

IOS Advanced 13th Day (0414)