ios - SHGraphLineView remove a plot -


i'm using class called shlinegraphview , it's working good, have problem didn't implemented methods removing plot. have it, can't quite figure right way do.

this how drawing plot:

- (void)addplot:(shplot *)newplot; {   if(nil == newplot) {     return;   }    if(_plots == nil){     _plots = [nsmutablearray array];   }   [_plots addobject:newplot]; }  - (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];   circlelayer.frame = self.bounds;   circlelayer.fillcolor = ((uicolor *)theme[kplotpointfillcolorkey]).cgcolor;   circlelayer.backgroundcolor = [uicolor clearcolor].cgcolor;   [circlelayer setstrokecolor:((uicolor *)theme[kplotpointfillcolorkey]).cgcolor];   [circlelayer setlinewidth:((nsnumber *)theme[kplotstrokewidthkey]).intvalue];    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]; // value in dollars   double yintervalvalue = yrange / interval_count;    //logic fill graph path, ciricle path, background path.   [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];      //x value     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);   }];    //move initial point path , background.   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 - 2.5, point.y - 2.5, 5, 5));   }    //move initial point path , background.   cgpathaddlinetopoint(graphpath, null, _leftmargintoleave + plot_width, plot.xpoints[count -1].y);   cgpathaddlinetopoint(backgroundpath, null, _leftmargintoleave + plot_width, plot.xpoints[count - 1].y);    //additional points background.   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;    //animation   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 - 20, point.y - 20, 40, 40);         [btn addtarget:self action:@selector(clicked:) forcontrolevents:uicontroleventtouchupinside];         objc_setassociatedobject(btn, kassociatedplotobject, plot, objc_association_retain_nonatomic);      [self addsubview:btn];     } }

and i've been added, can't figure out how remove plot:

- (void)removeplot:(shplot *)plot {     if (nil == plot) {         return;     }      if (_plots == nil) {         return;     }      [_plots removeobject:plot];     [self removeplotfromview:plot]; }

this need add in shlinegraphview.m file. method remove plots added on graphview.

- (void)removeallplots {     (uiview *view in self.subviews) {         view.layer.sublayers = nil;         [view removefromsuperview];     }      self.layer.sublayers = nil; }

for removing specific plot, first need give unique tag graphlayer, circlelayer , backgroundlayer.

you can adding following code in drawplot: method.

    [graphlayer setvalue:[nsnumber numberwithinteger:[_plots indexofobject:plot]]  forkey:@"pltag"];     [circlelayer.frame setvalue:[nsnumber numberwithinteger:[_plots indexofobject:plot]] forkey:@"pltag"];     [backgroundlayer setvalue:[nsnumber numberwithinteger:[_plots indexofobject:plot]] forkey:@"pltag"];

then, add method remove specific plot:

- (void)removeplot:(shplot *)plot {     if (plot == nil)         return;     else if (_plots == nil)         return;      (calayer *layer in self.layer.sublayers) {         if ([[layer valueforkey:@"pltag"] isequaltonumber:[nsnumber numberwithinteger:[_plots indexofobject:plot]]]) {             [layer removefromsuperlayer];         }     } }

hope helps you.


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