如何将UIColor值设置为CGContextSetRGBStrokeColor

Question

如何设置UIColor值CGContextSetRGBStrokeColor

//这是红色,我设置为CGContextSetRGBStrokeColor CGContextSetRGBStrokeColor(contextRef,1,0,0,1.00f);

现在我有UIColor,它有RGB值我需要设置这个值CGContextSetRGBStrokeColor.

任何人都建议我如何设定UIColor价值CGContextSetRGBStrokeColor

Answer 1

替代方案:

CGContextSetStrokeColorWithColor(context, [[UIColor greenColor] CGColor]);

// or
[[UIColor colorWithRed:1.0f green:0.0f blue:0.0f alpha:1.0f] CGColor];

Answer 2

CGFloat red, green, blue, alpha;
[color getRed:&red green:&green blue:&blue alpha:&alpha];
CGContextSetRGBStrokeColor(contextRef, red, green, blue, alpha);