CircleViewController.h
#import <UIKit/UIKit.h>
@interface CircleViewController : UIViewController
@end
CircleViewController. m
#import "CircleViewController.h"
#import "GraphView.h"
@interface CircleViewController()
@end
@implementation CircleViewController
- (void)viewDidLoad {
[super viewDidLoad];
GraphView *graphView = [[GraphView alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];
graphView.backgroundColor = [UIColor whiteColor];
graphView.layer.borderColor = [UIColor redColor].CGColor;
graphView.layer.borderWidth = 1.0f;
[self.view addSubview:graphView];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
GraphView.h
#import <UIKit/UIKit.h>
@interface GraphView : UIView
@end
GraphView.m
#import "GraphView.h"
@implementation GraphView
- (void)drawRect:(CGRect)rect {
CGPoint circleCenter = CGPointMake(self.bounds.size.width/2, self.bounds.size.height/2);
[self drawCircleWithCircleCenter:(CGPoint) circleCenter radius:80 firstColor:[UIColor blueColor].CGColor secondeColor:[UIColor redColor].CGColor lineWidth:2 startDegree:0 currentDegree:90];
//[self drawCircleWithCircleCenter2:(CGPoint) circleCenter radius:80 firstColor:[UIColor blueColor].CGColor secondeColor:[UIColor redColor].CGColor lineWidth:2 startDegree:0 currentDegree:90];
}
- (void)drawCircleWithCircleCenter:(CGPoint) circleCenter
radius:(CGFloat)radius
firstColor:(CGColorRef)firstColor
secondeColor:(CGColorRef)secondeColor
lineWidth:(CGFloat)lineWidth
startDegree:(float)startDegree
currentDegree:(float)endDegree {
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(context, lineWidth);
CGContextMoveToPoint(context, circleCenter.x, circleCenter.y);
CGContextAddArc(context, circleCenter.x , circleCenter.y, radius, [self radians:startDegree], [self radians:endDegree], 0);
CGContextSetFillColorWithColor(context, firstColor);
CGContextFillPath(context);
CGContextMoveToPoint(context, circleCenter.x, circleCenter.y);
CGContextAddArc(context, circleCenter.x, circleCenter.y, radius, [self radians:endDegree], [self radians:startDegree], 0);
CGContextSetFillColorWithColor(context, secondeColor);
CGContextFillPath(context);
}
- (void)drawCircleWithCircleCenter2:(CGPoint) circleCenter
radius:(CGFloat)radius
firstColor:(CGColorRef)firstColor
secondeColor:(CGColorRef)secondeColor
lineWidth:(CGFloat)lineWidth
startDegree:(float)startDegree
currentDegree:(float)endDegree {
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(context, lineWidth);
CGContextMoveToPoint(context, circleCenter.x, circleCenter.y);
CGContextAddArc(context, circleCenter.x , circleCenter.y, radius, [self radians:startDegree], [self radians:endDegree], 0);
CGContextSetFillColorWithColor(context, firstColor);
CGContextFillPath(context);
CGContextMoveToPoint(context, circleCenter.x, circleCenter.y);
CGContextAddArc(context, circleCenter.x, circleCenter.y, radius, [self radians:endDegree], [self radians:startDegree], 0);
CGContextSetStrokeColorWithColor(context, secondeColor);
CGContextStrokePath(context);
}
-(float) radians:(double) degrees {
return degrees * M_PI/180;
}
@end
UWAGA: Można zastosować jedną z metod 2: "drawCircleWithCircleCenter" lub "drawCircleWithCircleCenter2"
ten kod, jeśli w mrówka podzielić komórkę na 2 części tylko
jeśli chcesz podzielić komórkę na więcej niż 2 części można sprawdzić w ten sposób: „Drawing a circle ,filled different parts with different color” i sprawdzić odpowiedź zacząć tę frazę „mamy 6 klasę”
Jest to dość łatwe do naprawienia. Wystarczy dodać 'CGContextMoveToPoint (context, centerX, centerY);' w linii wcześniej. –