iOS Draw lines

//Add a Bezier curveCgcontextmovetopoint (Cgcontext, Max, -);//move to a pointCgcontextaddcurvetopoint (Cgcontext, Max, -, -, -, -, Max);//draw the curve of the Searle, the point accompanies the movement, these three parameters, each 2 is a parameter    1. Point ( Max， -) represents the start point2. Point ( -， -) is represented as a control point3. Point ( -， Max) is indicated as the terminating point//All in all: The tangent of a curve is plotted at the intersection of the control pointCgcontextaddcurvetopoint (Cgcontext, -, Max, -, $, Max, $)；//Cgcontextaddcurvetopoint (Cgcontext, Max, $, $, $, $, Max);//Cgcontextaddcurvetopoint (Cgcontext, $, Max, $, -, Max, -);//[[Uicolor Redcolor] setfill];//Fill ColorCgcontextdrawpath (Cgcontext, Kcgpathstroke);//draw on the brush//Cgcontextaddlinetopoint (Cgcontext,,);

 $ ); // Add a line

// Add a rectangle Cgcontextaddrect (Cgcontext, CGRectMake ());

//Add radiansCgcontextaddarc (Cgcontext, -, -, -,3.14/2, the*3.14/ the,1);//1. Origin Point (100,100)//2. Radius//3. Start Radian 3.14/2, 3.14 is pi//4. End Radian 270* 3.14/180//5. Counterclockwise for 1,0 to clockwise//----------Explain the arc of the circle, the radian is calculated in a clockwise direction, then the starting and ending radians are determined, and the radian is determined so that it is easier to draw in the clockwise direction.

Cgcontextclosepath (Cgcontext); // closed Curve

Cgcontextaddellipseinrect (Cgcontext, CGRectMake ()); // to cut an ellipse inside a rectangle is actually relatively simple.

iOS Draw lines