</pre><p style="margin-top: 0px; margin-bottom: 0px; line-height: normal; font-family: Menlo;"><pre name="code" class="objc" style="color: rgb(75, 209, 87); font-size: 11px;">//
//  TextView.m
//  練習
//
//  Created by 王文傑 on 16/9/20.
//  Copyright © 2016年 王文傑. All rights reserved.
//

#import "TextView.h"

@implementation TextView


// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    
    NSArray * Value = @[@"60",@"90",@"100",@"80",@"200",@"30"];
    NSArray * month = @[@"1月",@"2月",@"3月",@"4月",@"5月",@"6月"];
    //獲取資料最大值
    float max = [[Value valueForKeyPath:@"@max.intValue"] floatValue];
    //計算座標比例
    float value = 140/max;
    //迴圈建立柱狀圖
    for (int i = 0; i<Value.count; i++) {
        /**
         *  
         //獲得上下文
         CGContextRef ctx=UIGraphicsGetCurrentContext();
         //第二個引數是x軸，第三個是y軸/起點
         CGContextMoveToPoint(ctx, 80+i*50, 200);
         //第二個引數是x軸，第三個是y軸/終點
         CGContextAddLineToPoint(ctx, 80+i*50, self.bounds.size.height-[[cost objectAtIndex:i] floatValue]*value);
         //設定繪圖的顏色
         CGContextSetRGBStrokeColor(ctx, 1.0, 0.7, 0.3, 1.0);
         //設定線條的寬度
         CGContextSetLineWidth(ctx, 10);
         //設定線條的起點和終點的樣式
         CGContextSetLineCap(ctx, kCGLineCapButt);
         //設定寬度
         CGContextSetLineWidth(ctx, 20);
         //繪製一條空心的線
         CGContextStrokePath(ctx);

         *
         *  @return 第一種方法
         */
        
        
        
        UIBezierPath *Polyline = [UIBezierPath bezierPath];
        //設定起點
        [Polyline moveToPoint:CGPointMake(80+i*50, 200)];
        //設定終點
        [Polyline addLineToPoint:CGPointMake(80+i*50,self.bounds.size.height-[[Value objectAtIndex:i] floatValue]*value)];
        //設定顏色
        [[UIColor clearColor] set];
        //設定寬度
        Polyline.lineWidth = 20;
        //新增到畫布
        [Polyline stroke];
        
        //新增CAShapeLayer
        CAShapeLayer *shapeLine = [[CAShapeLayer alloc]init];
        //設定顏色
        shapeLine.strokeColor = [UIColor colorWithRed:0.400 green:1.000 blue:1.000 alpha:0.8].CGColor;
        //設定寬度
        shapeLine.lineWidth = 20.0;
        //把CAShapeLayer新增到當前檢視CAShapeLayer
        [self.layer addSublayer:shapeLine];
        //把Polyline的路徑賦予shapeLine
        shapeLine.path = Polyline.CGPath;
        
        //開始新增動畫
        [CATransaction begin];
        //建立一個strokeEnd路徑的動畫
        CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
        //動畫時間
        pathAnimation.duration = 2.0;
        //新增動畫樣式
        pathAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
        //動畫起點
        pathAnimation.fromValue = @0.0f;
        //動畫停止位置
        pathAnimation.toValue   = @1.0f;
        //把動畫新增到CAShapeLayer
        [shapeLine addAnimation:pathAnimation forKey:@"strokeEndAnimation"];
        //動畫終點
        shapeLine.strokeEnd = 1.0;
        //結束動畫
        [CATransaction commit];

        
        //柱狀圖值
        UILabel * label = [[UILabel alloc]initWithFrame:CGRectMake(60+i*50, self.bounds.size.height-20-[[Value objectAtIndex:i] floatValue]*value, 40, 20)];
        label.text = [NSString stringWithFormat:@"%@",[Value objectAtIndex:i]];
        label.textAlignment = NSTextAlignmentCenter;
        label.font = [UIFont systemFontOfSize:11];
        [self addSubview:label];
        //x軸座標
        UILabel * label1 = [[UILabel alloc]initWithFrame:CGRectMake(60+i*50, 200, 40, 20)];
        label1.text = [NSString stringWithFormat:@"%@",[month objectAtIndex:i]];
        label1.textAlignment = NSTextAlignmentCenter;
        label1.font = [UIFont systemFontOfSize:15];
        [self addSubview:label1];
        
    }
    
   
    
    //畫x軸
    for (int i = 0; i<15; i++) {
        UIBezierPath *Polyline = [UIBezierPath bezierPath];
        //設定起點
        [Polyline moveToPoint:CGPointMake(0, 200-i*10)];
        //設定終點
        [Polyline addLineToPoint:CGPointMake(self.bounds.size.width,200-i*10)];
        //設定顏色
        [[UIColor grayColor] set];
        //設定寬度
        Polyline.lineWidth = 0.3;
        //新增到畫布
        [Polyline stroke];
    }


}


@end