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调用strokeChart点对应旧的值没更新 #445

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MeteoriteMan opened this issue Sep 6, 2018 · 1 comment

MeteoriteMan commented Sep 6, 2018

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MeteoriteMan commented Sep 6, 2018 •

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我瞅了瞅源码.是以下方法创建的点上的文字

- (CATextLayer *)createPointLabelFor:(CGFloat)grade pointCenter:(CGPoint)pointCenter width:(CGFloat)width withChartData:(PNLineChartData *)chartData

然后作者使用了一个局部可变数组变量"gradePathArray"去存储实例化的CATextLayer.我们可以弄一个NSArray去记录一下这些layer.这些CATextLayer的实例化在如下方法中

- (void)calculateChartPath:(NSMutableArray *)chartPath andPointsPath:(NSMutableArray *)pointsPath andPathKeyPoints:(NSMutableArray *)pathPoints andPathStartEndPoints:(NSMutableArray *)pointsOfPath {

}

self.xxarray = gradePathArray.copy;
然后在调用stokeChart和updateChartData的时候便利一下这个数组.将其中存储的CATextLayer实例化对象removeFromSuperLayer.这样调用这俩方法的时候就会刷新了.

另,这个文字底部的白色默认颜色的问题可以搜索

[textLayer setBackgroundColor:[[[UIColor whiteColor] colorWithAlphaComponent:0.8] CGColor]];

因为这里头有些小细节的问题,具体我也不知道是哪一行了

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