Ios EXC_坏_访问图

我正在绘制图形，为此我使用

SHLineGraphView

现在在绘制一个图形之后，我需要删除该图形并再次拖动。一致

 CGPathMoveToPoint(backgroundPath, NULL, _leftMarginToLeave, plot.xPoints[0].y);

我收到了一条信息，内容是获取

EXC\u BAD\u ACCESS

。 这是我的职责。我在我的方案中添加了“是”

- (void)drawPlot:(SHPlot *)plot {

NSDictionary *theme = plot.plotThemeAttributes;

CAShapeLayer *backgroundLayer = [CAShapeLayer layer];
backgroundLayer.frame = self.bounds;
backgroundLayer.fillColor = ((UIColor *)theme[kPlotFillColorKey]).CGColor;
backgroundLayer.backgroundColor = [UIColor clearColor].CGColor;
[backgroundLayer setStrokeColor:[UIColor clearColor].CGColor];
[backgroundLayer setLineWidth:((NSNumber *)theme[kPlotStrokeWidthKey]).intValue];

CGMutablePathRef backgroundPath = CGPathCreateMutable();

CAShapeLayer *circleLayer = [CAShapeLayer layer];


UIBezierPath *circle = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(0, 0, 75, 75)];
circleLayer.path = circle.CGPath;
circleLayer.strokeColor = [UIColor orangeColor].CGColor;
circleLayer.fillColor = [UIColor whiteColor].CGColor;
circleLayer.shadowColor =[UIColor blackColor].CGColor;
circleLayer.lineWidth = 3.0;

[self.layer addSublayer:circleLayer];

CGMutablePathRef circlePath = CGPathCreateMutable();

CAShapeLayer *graphLayer = [CAShapeLayer layer];
graphLayer.frame = self.bounds;
graphLayer.fillColor = [UIColor clearColor].CGColor;
graphLayer.backgroundColor = [UIColor clearColor].CGColor;
[graphLayer setStrokeColor:((UIColor *)theme[kPlotStrokeColorKey]).CGColor];
[graphLayer setLineWidth:((NSNumber *)theme[kPlotStrokeWidthKey]).intValue];

CGMutablePathRef graphPath = CGPathCreateMutable();

double yRange = [_yAxisRange doubleValue];
double yIntervalValue = yRange / INTERVAL_COUNT;

[plot.plottingValues enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    NSDictionary *dic = (NSDictionary *)obj;

    __block NSNumber *_key = nil;
    __block NSNumber *_value = nil;

    [dic enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
        _key = (NSNumber *)key;
        _value = (NSNumber *)obj;
    }];

    int xIndex = [self getIndexForValue:_key forPlot:plot];

    double height = self.bounds.size.height - BOTTOM_MARGIN_TO_LEAVE;
    double y = height - ((height / ([_yAxisRange doubleValue] + yIntervalValue)) * [_value doubleValue]);
    (plot.xPoints[xIndex]).x = ceil((plot.xPoints[xIndex]).x);
    (plot.xPoints[xIndex]).y = ceil(y);
}];


CGPathMoveToPoint(graphPath, NULL, _leftMarginToLeave, plot.xPoints[0].y);
CGPathMoveToPoint(backgroundPath, NULL, _leftMarginToLeave, plot.xPoints[0].y);

int count = _xAxisValues.count;
for(int i=0; i< count; i++){
    CGPoint point = plot.xPoints[i];
    CGPathAddLineToPoint(graphPath, NULL, point.x, point.y);
    CGPathAddLineToPoint(backgroundPath, NULL, point.x, point.y);
    CGPathAddEllipseInRect(circlePath, NULL, CGRectMake(point.x - 5, point.y - 5, 10, 10));
}
CGPathAddLineToPoint(backgroundPath, NULL, _leftMarginToLeave + PLOT_WIDTH, self.bounds.size.height - BOTTOM_MARGIN_TO_LEAVE);
CGPathAddLineToPoint(backgroundPath, NULL, _leftMarginToLeave, self.bounds.size.height - BOTTOM_MARGIN_TO_LEAVE);
CGPathCloseSubpath(backgroundPath);
backgroundLayer.path = backgroundPath;
graphLayer.path = graphPath;
circleLayer.path = circlePath;
CGPathRelease(backgroundPath);
CGPathRelease(circlePath);
CGPathRelease(graphPath);

CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
animation.duration = 1;
animation.fromValue = @(0.0);
animation.toValue = @(1.0);
[graphLayer addAnimation:animation forKey:@"strokeEnd"];

backgroundLayer.zPosition = 0;
graphLayer.zPosition = 1;
circleLayer.zPosition = 2;

[self.layer addSublayer:graphLayer];
[self.layer addSublayer:circleLayer];
[self.layer addSublayer:backgroundLayer];

NSUInteger count2 = _xAxisValues.count;
for(int i=0; i< count2; i++){
    CGPoint point = plot.xPoints[i];
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    btn.backgroundColor = [UIColor clearColor];
    btn.tag = i;
    btn.frame = CGRectMake(point.x - 10, point.y - 10, 40, 40);
    [btn addTarget:self action:@selector(clicked:) forControlEvents:UIControlEventTouchUpInside];
    objc_setAssociatedObject(btn, kAssociatedPlotObject, plot, OBJC_ASSOCIATION_RETAIN_NONATOMIC);

    [self addSubview:btn];
}

-（无效）绘图：（SHPlot*）绘图{
NSDictionary*theme=plot.plotThemeAttributes；
CAShapeLayer*backgroundLayer=[CAShapeLayer层]；
backgroundLayer.frame=self.bounds；
backgroundLayer.fillColor=（（UIColor*）主题[kPlotFillColorKey]）.CGColor；
backgroundLayer.backgroundColor=[UIColor clearColor].CGColor；
[backgroundLayer setStrokeColor:[UIColor clearColor].CGColor]；
[backgroundLayer setLineWidth:（（NSNumber*）主题[kPlotStrokeWidthKey]）.intValue]；
CGMutablePathRef backgroundPath=CGPathCreateMutable（）；
CAShapeLayer*circleLayer=[CAShapeLayer层]；
UIBezierPath*circle=[UIBezierPath bezierPathWithOvalInRect:CGRectMake（0,0,75,75）]；
circleLayer.path=circle.CGPath；
circleLayer.strokeColor=[UIColor orangeColor].CGColor；
circleLayer.fillColor=[UIColor whiteColor].CGColor；
circleLayer.shadowColor=[UIColor blackColor].CGColor；
circleLayer.lineWidth=3.0；
[self.layer addSublayer:circleLayer]；
CGMutablePathRef circlePath=CGPathCreateMutable（）；
CAShapeLayer*graphLayer=[CAShapeLayer层]；
graphLayer.frame=self.bounds；
graphLayer.fillColor=[UIColor clearColor].CGColor；
graphLayer.backgroundColor=[UIColor clearColor].CGColor；
[graphLayer setStrokeColor:（（UIColor*）主题[kPlotStrokeColorKey]）.CGColor]；
[graphLayer setLineWidth:（（NSNumber*）主题[kPlotStrokeWidthKey]）.intValue]；
CGMutablePathRef graphPath=CGPathCreateMutable（）；
双Y范围=[[u yAxisRange doubleValue]；
双yIntervalValue=Y范围/间隔计数；
[plot.plottingValues enumerateObjectsUsingBlock:^（id obj，整数idx，布尔*停止）{
NSDictionary*dic=（NSDictionary*）obj；
__块NSNumber*_key=nil；
__块NSNumber*_值=零；
[dic enumerateKeysAndObjectsUsingBlock:^（id键、id对象、布尔*停止）{
_键=（NSNumber*）键；
_值=（NSNumber*）obj；
}];
int xIndex=[self getIndexForValue:_-key for-plot:plot]；
双倍高度=self.bounds.size.height-底部至左边的边距；
双y=高度-（（高度/（[[u yAxisRange doubleValue]+yIntervalValue））*[[u value doubleValue]）；
（plot.xPoints[xIndex]）.x=ceil（（plot.xPoints[xIndex]）.x）；
（plot.xPoints[xIndex]）.y=ceil（y）；
}];
CGPathMoveToPoint（graphPath，NULL，_leftMarginToLeave，plot.xPoints[0].y）；
CGPathMoveToPoint（backgroundPath，NULL，_leftMarginToLeave，plot.xPoints[0].y）；
int count=\u xAxisValues.count；
for（int i=0；i

}

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感谢

使用NSZombie找出错误。检查所有值是否为“零”。检查plot.xPoints[]是否包含任何内容。Yes plot.xPoints[]包含数据。如@Rushabh所述，在此处共享崩溃日志-启用NSZombie查找错误/异常/日志。