iOS UIBezierPath实现饼状图

这篇文章主要为大家详细介绍了iOS UIBezierPath实现饼状图，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

本文实例为大家分享了iOS UIBezierPath实现饼状图的具体代码，供大家参考，具体内容如下

首先看效果图：

代码：

				?

									#import <UIKit/UIKit.h>

									NS_ASSUME_NONNULL_BEGIN

									@interface CircleView : UIView

									@property (nonatomic, copy) NSArray<NSNumber *> *valueArray;

									@end

									NS_ASSUME_NONNULL_END

									//

									#define S_W self.frame.size.width

									#import "CircleView.h"

									@interface CircleView ()

									@property (nonatomic, copy) NSArray<NSNumber *> *dataArray;

									@property (nonatomic, assign) CGFloat endAngleFloat; // 每个扇形起点角度

									@end

									@implementation CircleView

									- (void)setValueArray:(NSArray<NSNumber *> *)valueArray {

									 self.dataArray = valueArray;

									 self.endAngleFloat = 0;

									 [self creatUI];

									}

									- (void)creatUI {

									 for (NSInteger i = 0; i<_dataArray.count; i++) {

									 CAShapeLayer *shapeLayer = [CAShapeLayer layer];

									 shapeLayer.lineWidth = 1;

									 shapeLayer.fillColor = [UIColor colorWithRed:arc4random()%256/255.0f green:arc4random()%256/255.0f blue:arc4random()%256/255.0f alpha:1].CGColor;

									 shapeLayer.strokeColor = shapeLayer.fillColor;

									 CGFloat valueFloat = [_dataArray[i] floatValue];

									 CGFloat angleFloat = valueFloat*2*M_PI/100;

									 UIBezierPath *bezierPath = [UIBezierPath bezierPath];

									 [bezierPath moveToPoint:CGPointMake(S_W/2, S_W/2)];

									 [bezierPath addLineToPoint:CGPointMake(S_W*(1+cos(_endAngleFloat))/2, S_W*(1+sin(_endAngleFloat))/2)];

									 [bezierPath addArcWithCenter:CGPointMake(S_W/2, S_W/2) radius:S_W/2 startAngle:_endAngleFloat endAngle:angleFloat+_endAngleFloat clockwise:YES];

									 [bezierPath closePath];

									 shapeLayer.path = bezierPath.CGPath;

									 [self.layer addSublayer:shapeLayer];

									 [self addLabelWithFloat:valueFloat angleFloat:angleFloat];

									 _endAngleFloat += angleFloat;

									 }

									}

									- (void)addLabelWithFloat:(CGFloat)valueFloat angleFloat:(CGFloat)angleFloat {

									 UILabel *label = [[UILabel alloc] init];

									 label.center = CGPointMake(S_W*(2+cos(angleFloat/2 + _endAngleFloat))/4, S_W*(2+sin(angleFloat/2 + _endAngleFloat))/4);

									 label.bounds = CGRectMake(0, 0, 50, 50);

									 label.text = [NSString stringWithFormat:@"%.f%%",valueFloat];

									 label.textColor = UIColor.whiteColor;

									 label.textAlignment = NSTextAlignmentCenter;

									 label.font = [UIFont systemFontOfSize:14];

									 [self addSubview:label];

									}

外部调用:

				?

									CircleView *view = [[CircleView alloc] initWithFrame:CGRectMake(20, 100, self.view.frame.size.width-40, self.view.frame.size.width-40)];

									 view.valueArray = @[@(10),@(20),@(30),@(40)];

									 [self.view addSubview:view];