CoreAnimationは折れ線表を実現する

割引テーブルを1つのviewにカプセル化し、使用者に露出するのはデータを転送する方法が1つしかない.

//
//  ChartLine.h
//  BoxingChampion
//  ：       ，           frame       20，     50
//  Created by on 14-12-29.
//  Copyright (c) 2014  . All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ChartLine : UIView

/*
      ：     
      ：      ， @[@1,@2]
       ： 
 */
-(void)setData:(NSArray *)array_data;

@end

はい.mファイルで、書き換え-(id)initWithFrame:(CGRect)frameメソッド.
折れ線表で、1、座標軸レイヤーの3つのレイヤーに分けて表すことができます.2、背景色のレイヤー.3、データ折れ線レイヤー.ここで、座標画層はベッセル曲線を設定し、経路に基づいて座標軸を描画します.

        //          
        UIBezierPath *path_coordinate=[[UIBezierPath alloc] init];
        [path_coordinate moveToPoint:CGPointMake(8, 12)]; //         
        [path_coordinate addLineToPoint:CGPointMake(10, 10)];
        [path_coordinate addLineToPoint:CGPointMake(12, 12)];
        [path_coordinate addLineToPoint:CGPointMake(10, 10)];
        [path_coordinate addLineToPoint:CGPointMake(10, self.frame.size.height-10)];
        [path_coordinate addLineToPoint:CGPointMake(self.frame.size.width-10, self.frame.size.height-10)];
        [path_coordinate addLineToPoint:CGPointMake(self.frame.size.width-12, self.frame.size.height-12)];
        [path_coordinate addLineToPoint:CGPointMake(self.frame.size.width-10, self.frame.size.height-10)];
        [path_coordinate addLineToPoint:CGPointMake(self.frame.size.width-12, self.frame.size.height-8)];
            
        //       
        CAShapeLayer *layer_coordinate=[CAShapeLayer layer];
        layer_coordinate.frame=
                            CGRectMake(0, 0, self.layer.frame.size.width, self.layer.frame.size.height);
        layer_coordinate.lineCap=kCALineCapButt;
        layer_coordinate.lineWidth=2;
        layer_coordinate.fillColor=[[UIColor clearColor] CGColor];
        layer_coordinate.strokeColor=[[UIColor orangeColor] CGColor];
        layer_coordinate.strokeEnd=1;
        layer_coordinate.path=[path_coordinate CGPath];

背景色レイヤーにはグラデーション効果があり、背景色は座標軸に囲まれた象限内にある必要があります.

 //      
        CAGradientLayer *layer_background=[CAGradientLayer layer];
        layer_background.frame=CGRectMake(11, 13, self.layer.frame.size.width-22,self.layer.frame.size.height-24);//       
        [layer_background setColors:[NSArray arrayWithObjects:
                                     (id)[[UIColor whiteColor] CGColor],
                                     [[UIColor colorWithRed:1.000 green:0.827 blue:0.000 alpha:1.000] CGColor] ,nil]];
        layer_background.locations=@[@0.1];// 0.1       location       （0，0），    （1，1）       
        layer_background.startPoint=CGPointMake(0,0);
        layer_background.endPoint=CGPointMake(0, 1);

ビューレイヤーに2つのレイヤーを追加

      //    
        [self.layer addSublayer:layer_coordinate];
        [self.layer addSublayer:layer_background];

最後に、setData:メソッドを呼び出すと、折れ線グラフが描画されます.

-(void)setData:(NSArray *)array_data
{
    //         
    NSInteger i_dataCount=[array_data count];
    
    //             
    CGFloat f_maxData=[[array_data objectAtIndex:0] floatValue];
    CGFloat f_minData=[[array_data objectAtIndex:0]floatValue];
    for (NSInteger i=0;i<i_dataCount; i++)
    {
        if (f_maxData<[[array_data objectAtIndex:i] floatValue])
        {
            f_maxData=[[array_data objectAtIndex:i] floatValue];
        }
        if (f_minData>[[array_data objectAtIndex:i] floatValue])
        {
            f_minData=[[array_data objectAtIndex:i] floatValue];
        }
    }
    
    //              
    CGFloat x_perDataPointInterval=(self.layer.frame.size.width-20)/(i_dataCount+1);
    if (0==(f_maxData-f_minData))//      
    {
        NSLog(@"Y              ");
        return;
    }
    
    //      1        
    CGFloat y_perPointInterval=(self.layer.frame.size.height-50)/(f_maxData-f_minData);
    
    //    
    UIBezierPath *path_data=[[UIBezierPath alloc] init];
    
    //           
    [path_data moveToPoint:CGPointMake(10+x_perDataPointInterval,
                                       self.layer.frame.size.height-(20+([[array_data objectAtIndex:0] floatValue]-f_minData)*y_perPointInterval))];
    
    for (NSInteger i=0; i<i_dataCount-1; i++)
    {
        //           
        [path_data addLineToPoint:CGPointMake(10+x_perDataPointInterval*(i+2),
                                             self.layer.frame.size.height-(20+([[array_data objectAtIndex:(i+1)] floatValue]-f_minData)*y_perPointInterval))];
    }

    //    
    CAShapeLayer *layer_data=[CAShapeLayer layer];
    layer_data.frame=CGRectMake(0, 0, self.layer.frame.size.width, self.layer.frame.size.height);
    layer_data.lineCap=kCALineCapRound;
    layer_data.lineWidth=1;
    layer_data.fillColor=[[UIColor clearColor] CGColor];
    layer_data.strokeColor=[[UIColor redColor] CGColor];
    layer_data.strokeEnd=1;
    layer_data.path=[path_data CGPath];

    [self.layer addSublayer:layer_data];
}