本文介绍了使用CGPath绘制一条线的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何使用CGPath绘制一条线?
How can I draw a line by using CGPath ?
推荐答案
因为你没有真正指定如何绘制一条带路径的线,我只想给你一个例子。
As you didn't really specify more than how to draw a line with a path, I'll just give you an example.
在路径的左上角和右下角(在iOS上)之间绘制一条带有路径的对角线在UIView的drawRect:
Drawing a diagonal line between the top left corner and the bottom right (on iOS) with a path in a UIView's drawRect:
- (void)drawRect:(CGRect)rect {
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, 0, 0);
CGPathAddLineToPoint(path, NULL, CGRectGetMaxX(rect), CGRectGetMaxY(rect));
CGPathCloseSubpath(path);
CGContextAddPath(ctx, path);
CGContextSetStrokeColorWithColor(ctx,[UIColor whiteColor].CGColor);
CGContextStrokePath(ctx);
CGPathRelease(path);
}
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