iOS UIBezierPath实现饼状图

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:

iOS UIBezierPath实现饼状图

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