使用CAShapeLayer

Question

我希望根据百分比圈出角落。 例如，如果评级是10分中的3分。我想用一种颜色圈出角半径并保留其他颜色。

以下是我的代码：

 UIView *mainView = [[UIView alloc]initWithFrame:CGRectMake(170, 5, 50, 50)];
[mainView setBackgroundColor:[UIColor whiteColor]];
[viewAwesome addSubview:mainView];

mainView.layer.cornerRadius = mainView.frame.size.width / 2;

mainView.clipsToBounds = YES;
mainView.layer.rasterizationScale = [UIScreen mainScreen].scale;
mainView.layer.shouldRasterize = YES;

UILabel *lblRatingVal = [[UILabel alloc]initWithFrame:CGRectMake(170, 5, 50, 50)];
lblRatingVal.text = [NSString stringWithFormat:@" %@",[dictRelevance valueForKey:@"avg_rating"]];

lblRatingVal.textColor = [UIColor colorWithRed:59.0/255.0 green:59.0/255.0 blue:59.0/255.0 alpha:1.0f];
lblRatingVal.font = [UIFont fontWithName:@"HelveticaNeueLight" size:6.0] ;
lblRatingVal.textAlignment = NSTextAlignmentCenter;
[viewAwesome addSubview:lblRatingVal];

CAShapeLayer *circleLayerRating = [CAShapeLayer layer];
circleLayerRating.path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(0, 0, 50, 50)].CGPath;
circleLayerRating.fillColor = nil;
circleLayerRating.strokeColor = [UIColor redColor].CGColor;
circleLayerRating.strokeEnd = val;
circleLayerRating.lineWidth = 5;
[mainView.layer addSublayer:circleLayerRating];

我想要留下蓝色的颜色。任何帮助？

Answer 1

也许你可以使用https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UIBezierPath_class/index.html#//apple_ref/occ/clm/UIBezierPath/bezierPathWithArcCenter:radius:startAngle:endAngle:clockwise： 用于绘制圆圈。首先用0-2π和红色顶部绘制蓝色圆圈。