Line of basic graphics for iOS drawing

1 #import<UIKit/UIKit.h>2 3 @interfaceNjlineview:uiview4 @end5 6 7 #import "NJLineView.h"8 9 @implementationNjlineviewTen  One //the DrawRect method is called when the custom view is first displayed A- (void) DrawRect: (cgrect) Rect - { -     //1. Get the graphical context associated with the current view (because the graphics context determines the output target to be drawn)/ the      -     //if the Uigraphicsgetcurrentcontext method is called in the DrawRect method , the context of the layer is obtained. -Cgcontextref CTX =Uigraphicsgetcurrentcontext (); -      +     //2. Drawing (drawing lines), saving drawing information -     //set the starting point +Cgcontextmovetopoint (CTX,Ten, -); A     //Set End point atCgcontextaddlinetopoint (CTX, -, -); -  -     //Set Drawing status -     //Set Line Color red -Cgcontextsetrgbstrokecolor (CTX,1.0,0,0,1.0); -     //Set line width inCgcontextsetlinewidth (CTX,Ten); -     //styling the start and end points of a line to Cgcontextsetlinecap (CTX, kcglinecapround); +     //style to set the corners of a line - Cgcontextsetlinejoin (CTX, kcglinejoinround); the     //draw a hollow line * Cgcontextstrokepath (CTX); $     Panax Notoginseng     /*------------------Gorgeous split-line---------------------*/ -      the     //Reset the start point of the second line +Cgcontextmovetopoint (CTX, Max, $); A     //sets the end of the second line (automatically the end of the previous line as the starting point) theCgcontextaddlinetopoint (CTX, -, -); +     //set the color of the second line green - //[[Uicolor Greencolor] set]; $Cgcontextsetrgbstrokecolor (CTX,0,1.0,0,1.0); $      -     //drawing Graphics (rendering graphics to view) -     //draw a hollow line the Cgcontextstrokepath (CTX); - Wuyi } the  - @end

Line of basic graphics for iOS drawing