欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  移动技术

iOS实现的多条折线图封装实例

程序员文章站 2023-12-19 13:37:16
前言 有时候我们在处理一些数据的时候,需要用到折线图来呈现数据,让用户能够对数据更加清晰明,本文主要给大家介绍了关于ios实现多条折线图的相关内容,下面话不多说,来看看详...

前言

有时候我们在处理一些数据的时候,需要用到折线图来呈现数据,让用户能够对数据更加清晰明,本文主要给大家介绍了关于ios实现多条折线图的相关内容,下面话不多说,来看看详细的介绍吧。

效果图如下:

iOS实现的多条折线图封装实例

iOS实现的多条折线图封装实例

1、封装类

.h

#define xyqcolor(r, g, b) [uicolor colorwithred:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
#define xyqrandomcolor xyqcolor(arc4random_uniform(256), arc4random_uniform(256), arc4random_uniform(256))
#define margin  30 // 坐标轴与画布间距
#define y_every_margin 20 // y轴每一个值的间隔数

#import <uikit/uikit.h>
// 线条类型
typedef ns_enum(nsinteger, linetype) {
 linetype_straight, // 折线
 linetype_curve // 曲线
};
@interface beziercurveview : uiview

//初始化画布
+(instancetype)initwithframe:(cgrect)frame;
//画多根折线图
-(void)drawmorelinechartviewwithx_value_names:(nsmutablearray *)x_names targetvalues:(nsmutablearray *)targetvalues linetype:(linetype) linetype;
@end

.m

#import "beziercurveview.h"

static cgrect myframe;

@interface beziercurveview ()

@end
@implementation beziercurveview

//初始化画布
+(instancetype)initwithframe:(cgrect)frame{

 beziercurveview *beziercurveview = [[beziercurveview alloc]init]; 
 beziercurveview.frame = frame;

 //背景视图
 uiview *backview = [[uiview alloc] initwithframe:cgrectmake(0, 0, frame.size.width, frame.size.height)];
 backview.backgroundcolor = [uicolor clearcolor];
 [beziercurveview addsubview:backview];

 myframe = frame;
 return beziercurveview;
}
/**
 * 画坐标轴
 */
-(void)drawxyline:(nsmutablearray *)x_names{

 uibezierpath *path = [uibezierpath bezierpath];

 //1.y轴、x轴的直线
 [path movetopoint:cgpointmake(margin, cgrectgetheight(myframe)-margin)];
 [path addlinetopoint:cgpointmake(margin, margin)];

 [path movetopoint:cgpointmake(margin, cgrectgetheight(myframe)-margin)];
 [path addlinetopoint:cgpointmake(cgrectgetwidth(myframe), cgrectgetheight(myframe)-margin)];

// //2.添加箭头
// [path movetopoint:cgpointmake(margin, margin)];
// [path addlinetopoint:cgpointmake(margin-5, margin+5)];
// [path movetopoint:cgpointmake(margin, margin)];
// [path addlinetopoint:cgpointmake(margin+5, margin+5)];
// 
// [path movetopoint:cgpointmake(cgrectgetwidth(myframe), cgrectgetheight(myframe)-margin)];
// [path addlinetopoint:cgpointmake(cgrectgetwidth(myframe)-5, cgrectgetheight(myframe)-margin-5)];
// [path movetopoint:cgpointmake(cgrectgetwidth(myframe), cgrectgetheight(myframe)-margin)];
// [path addlinetopoint:cgpointmake(cgrectgetwidth(myframe)-5, cgrectgetheight(myframe)-margin+5)];

 //3.添加索引格
 //x轴
 for (int i=0; i<x_names.count; i++) {
 cgfloat x = margin + (cgrectgetwidth(myframe)-30)/x_names.count*(i+1)-(cgrectgetwidth(myframe)-30)/x_names.count/2.0;
 cgpoint point = cgpointmake(x,cgrectgetheight(myframe)-margin);
 [path movetopoint:point];
 [path addlinetopoint:cgpointmake(point.x, point.y-3)];
 }
 //y轴(实际长度为200,此处比例缩小一倍使用)
 for (int i=0; i<11; i++) {
 cgfloat y = cgrectgetheight(myframe)-margin-y_every_margin*i;
 cgpoint point = cgpointmake(margin,y);
 [path movetopoint:point];
 [path addlinetopoint:cgpointmake(point.x+3, point.y)];
 }

 //4.添加索引格文字
 //x轴
 for (int i=0; i<x_names.count; i++) {
 cgfloat x = margin + (cgrectgetwidth(myframe)-30)/x_names.count/2.0 + (cgrectgetwidth(myframe)-30)/x_names.count*i-(cgrectgetwidth(myframe)-30)/x_names.count/2.0;
 uilabel *textlabel = [[uilabel alloc] initwithframe:cgrectmake(x, cgrectgetheight(myframe)-margin, (cgrectgetwidth(myframe)-60)/x_names.count, 20)];
 textlabel.text = x_names[i];
 textlabel.font = [uifont systemfontofsize:10];
 textlabel.textalignment = nstextalignmentcenter;
 textlabel.textcolor = [uicolor bluecolor];
 [self addsubview:textlabel];
 }
 //y轴
 for (int i=0; i<11; i++) {
 cgfloat y = cgrectgetheight(myframe)-margin-y_every_margin*i;
 uilabel *textlabel = [[uilabel alloc] initwithframe:cgrectmake(0, y-5, margin, 10)];
 textlabel.text = [nsstring stringwithformat:@"%d",10*i];
 textlabel.font = [uifont systemfontofsize:10];
 textlabel.textalignment = nstextalignmentcenter;
 textlabel.textcolor = [uicolor redcolor];
 [self addsubview:textlabel];
 }
 //5.渲染路径
 cashapelayer *shapelayer = [cashapelayer layer];
 shapelayer.path = path.cgpath;
 shapelayer.strokecolor = [uicolor blackcolor].cgcolor;
 shapelayer.fillcolor = [uicolor clearcolor].cgcolor;
 shapelayer.borderwidth = 2.0;
 [self.subviews[0].layer addsublayer:shapelayer];
}
/**
 * 画多根折线图
 */
-(void)drawmorelinechartviewwithx_value_names:(nsmutablearray *)x_names targetvalues:(nsmutablearray *)targetvalues linetype:(linetype) linetype{

 //1.画坐标轴
 [self drawxyline:x_names];

 for (int j=0; j<targetvalues.count; j++) {
 //2.获取目标值点坐标
 nsmutablearray *allpoints = [nsmutablearray array];
 for (int i=0; i<[targetvalues[j] count]; i++) {
  cgfloat doublevalue = 2*[targetvalues[j][i] floatvalue]; //目标值放大两倍
  cgfloat x = margin + (cgrectgetwidth(myframe)-30)/x_names.count*(i+1)-(cgrectgetwidth(myframe)-30)/x_names.count/2.0;
  cgfloat y = cgrectgetheight(myframe)-margin-doublevalue;
  cgpoint point = cgpointmake(x,y);
  uibezierpath *path = [uibezierpath bezierpathwithroundedrect:cgrectmake(point.x-1, point.y-1, 2.5, 2.5) cornerradius:2.5];
  cashapelayer *layer = [cashapelayer layer];
  layer.strokecolor = [uicolor purplecolor].cgcolor;
  layer.fillcolor = [uicolor purplecolor].cgcolor;
  layer.path = path.cgpath;
  [self.subviews[0].layer addsublayer:layer];
  [allpoints addobject:[nsvalue valuewithcgpoint:point]];
 }

 //3.坐标连线
 uibezierpath *path = [uibezierpath bezierpath];
 [path movetopoint:[allpoints[0] cgpointvalue]];

 cgpoint preponit;
 switch (linetype) {
  case linetype_straight: //直线
  for (int i =1; i<allpoints.count; i++) {
   cgpoint point = [allpoints[i] cgpointvalue];
   [path addlinetopoint:point];
  }
  break;
  case linetype_curve: //曲线
  for (int i =0; i<allpoints.count; i++) {
   if (i==0) {
   preponit = [allpoints[0] cgpointvalue];
   }else{
   cgpoint nowpoint = [allpoints[i] cgpointvalue];
   [path addcurvetopoint:nowpoint controlpoint1:cgpointmake((preponit.x+nowpoint.x)/2, preponit.y) controlpoint2:cgpointmake((preponit.x+nowpoint.x)/2, nowpoint.y)]; //三次曲线
   preponit = nowpoint;
   }
  }
  break;
 }

 cashapelayer *shapelayer = [cashapelayer layer];
 shapelayer.path = path.cgpath;
 shapelayer.strokecolor = xyqrandomcolor.cgcolor;
 shapelayer.fillcolor = [uicolor clearcolor].cgcolor;
 shapelayer.borderwidth = 2.0;
 [self.subviews[0].layer addsublayer:shapelayer];
 }
}

2、调用

#define screen_w [uiscreen mainscreen].bounds.size.width
#define screen_h [uiscreen mainscreen].bounds.size.height
 //1.初始化
 _bezierview = [beziercurveview initwithframe:cgrectmake(30, 30, screen_w-60, 280)];
 _bezierview.center = self.view.center;
 [self.view addsubview:_bezierview];
 // 多根折线图
 [_bezierview drawmorelinechartviewwithx_value_names:(nsmutablearray *)@[@"语文",@"数学",@"英语",@"物理",@"化学",@"生物",@"政治",@"历史",@"地理"] targetvalues:(nsmutablearray *)@[@[@60,@20,@50,@30,@90,@30,@100,@70, @20],@[@20,@40,@20,@50,@30,@90,@30,@100,@70],@[@10,@30,@40,@70,@50,@30,@20,@10,@80]] linetype:linetype_straight];

总结

以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流,谢谢大家对的支持。

上一篇:

下一篇: