1、封裝類
.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 // 坐標軸與畫布間距
#define Y_EVERY_MARGIN 20 // y軸每一個值的間隔數
#import <UIKit/UIKit.h>
// 線條類型
typedef NS_ENUM(NSInteger, LineType) {
LineType_Straight, // 折線
LineType_Curve // 曲線
};
@interface BezierCurveView : UIView
//初始化畫布
+(instancetype)initWithFrame:(CGRect)frame;
//畫多根折線圖
-(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
//初始化畫布
+(instancetype)initWithFrame:(CGRect)frame{
BezierCurveView *bezierCurveView = [[BezierCurveView alloc]init];
bezierCurveView.frame = frame;
//背景視圖
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;
}
/**
* 畫坐標軸
*/
-(void)drawXYLine:(NSMutableArray *)x_names{
UIBezierPath *path = [UIBezierPath bezierPath];
//1.Y軸、X軸的直線
[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.添加箭頭
// [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軸
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軸（實際長度為200,此處比例縮小一倍使用）
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軸
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軸
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.渲染路徑
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];
}
/**
* 畫多根折線圖
*/
-(void)drawMoreLineChartViewWithX_Value_Names:(NSMutableArray *)x_names TargetValues:(NSMutableArray *)targetValues LineType:(LineType) lineType{
//1.畫坐標軸
[self drawXYLine:x_names];
for (int j=0; j<targetValues.count; j++) {
//2.獲取目標值點坐標
NSMutableArray *allPoints = [NSMutableArray array];
for (int i=0; i<[targetValues[j] count]; i++) {
CGFloat doubleValue = 2*[targetValues[j][i] floatValue]; //目標值放大兩倍
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.坐標連線
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:[allPoints[0] CGPointValue]];
CGPoint PrePonit;
switch (lineType) {
case LineType_Straight: //直線
for (int i =1; i<allPoints.count; i++) {
CGPoint point = [allPoints[i] CGPointValue];
[path addLineToPoint:point];
}
break;
case LineType_Curve: //曲線
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)]; //三次曲線
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、調用
#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];
// 多根折線圖
[_bezierView drawMoreLineChartViewWithX_Value_Names:(NSMutableArray *)@[@"語文",@"數學",@"英語",@"物理",@"化學",@"生物",@"政治",@"歷史",@"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];
