绘图圆没有填写IOS

概述我正在使用这段代码在UI ImageView中画一个圆. CAShapeLayer *circleLayer = [CAShapeLayer layer];// Give the layer the same bounds as your image view[circleLayer setBounds:CGRectMake(0.0f, 0.0f, [photoView bounds].siz 我正在使用这段代码在UI ImageVIEw中画一个圆.

CAShapeLayer *circleLayer = [CAShapeLayer layer];// Give the layer the same bounds as your image vIEw[circleLayer setBounds:CGRectMake(0.0f,0.0f,[photoVIEw bounds].size.wIDth,[photoVIEw bounds].size.height)];// position the circle anywhere you like,but this will center it// In the parent layer,which will be your image vIEw's root layer[circleLayer setposition:CGPointMake(coordsFinal.x + 130,coordsFinal.y + 200)];// Create a circle path.UIBezIErPath *path = [UIBezIErPath bezIErPathWith@R_404_6631@InRect:                      CGRectMake(0.0f,50.0f,50.0f)];// Set the path on the layer[circleLayer setPath:[path CGPath]];// Set the stroke color[circleLayer setstrokecolor:[color CGcolor]];// Set the stroke line wIDth[circleLayer setlinewidth:2.0f];// Add the sublayer to the image vIEw's layer tree[[photoVIEw layer] addSublayer:circleLayer];

我希望圈子是空的,只有边界.如何清除填充？

解决方法 将填充颜色设置为透明(Alpha 0)

[circleLayer setFillcolor:[[UIcolor colorWithWhite:0 Alpha:0] CGcolor]];

AKA …

[circleLayer setFillcolor:[[UIcolor clearcolor] CGcolor]];

(谢谢Zev)

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