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第一种圆形扇形
PieView.h
@interface PieView : UIView
-(instancetype)initWithCenter:(CGPoint)center radius:(CGFloat)radius bgColor:(UIColor *)bgColor andstartAngle:(CGFloat)startAngle andendAngle:(CGFloat)endAngle;
@end
-(instancetype)initWithCenter:(CGPoint)center radius:(CGFloat)radius bgColor:(UIColor *)bgColor andstartAngle:(CGFloat)startAngle andendAngle:(CGFloat)endAngle {
self = [super init];
if (self) {
//设置self的frame和center
self.backgroundColor = bgColor;
self.frame = CGRectMake(0, 0, radius * 2, radius * 2);
self.center = center;
//特别注意：贝塞尔曲线的radius必须为self高度的四分之一，CAShapeLayer的线宽必须为self高度的二分之一
UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointMake(radius, radius) radius:radius / 2 startAngle:startAngle endAngle:endAngle clockwise:YES];
CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.path = path.CGPath;
maskLayer.fillColor = [UIColor clearColor].CGColor;
maskLayer.strokeColor = bgColor.CGColor;
maskLayer.lineWidth = radius; //等于半径的2倍，以圆的边缘为中心，向圆内部伸展一个半径，向外伸展一个半径，所以看上去以为圆的半径是self高度的一半。
self.layer.mask = maskLayer;
}
return self;
}
- 实现
CGPoint point = CGPointMake(150, 150);
PieView *redView = [[PieView alloc] initWithCenter:point radius:50 bgColor:[UIColor redColor] andstartAngle:-M_PI/2 andendAngle:0.0];
[self.view addSubview:redView];
PieView *blueView = [[PieView alloc] initWithCenter:point radius:70 bgColor:[UIColor blueColor] andstartAngle:0.0f andendAngle:M_PI*3/2];
[self.view addSubview:blueView];
- 第二种扇形圆形
#import "CustomView.h"
@implementation CustomView
-(instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
}
return self;
}
-(void)setArray:(NSArray *)array
{
_array = array;
[self setNeedsDisplay];
}
- (void)drawRect:(CGRect)rect {
CGFloat x = self.frame.size.width / 2;
CGFloat y = self.frame.size.height / 2;
CGFloat radius = (self.frame.size.width / 2) - 20.0f;
float startAng= 0;
for(NSNumber * obj in _array)
{
//计算角度
CGFloat Ang = [obj floatValue] * M_PI*2;
//计算结束角度
Ang = Ang + startAng;
//路径
UIBezierPath *path =[UIBezierPath bezierPathWithArcCenter:CGPointMake(x, y) radius:radius startAngle:startAng endAngle:Ang clockwise:YES];
//画线
[path addLineToPoint:CGPointMake(x, y)];
//这里randomColor是封装的类方法，这里就不写了，具体作用就是生成随机色
[[self setAndomColor] setFill];
//渲染
[path fill];
startAng = Ang;
}
}
-(UIColor *)setAndomColor
{
CGFloat redValue = arc4random() %255;
CGFloat greenValue = arc4random() %255;
CGFloat blueValue = arc4random() %255;
UIColor *andomColor = [UIColor colorWithRed: redValue/255.0f green:greenValue/255.0f blue: blueValue/255.0f alpha:1.0f];
return andomColor;
}
CGFloat x = 60.0f;
CGFloat y = 60.0f;
CGFloat width = 100.0f;
CGFloat height = 100.0f;
CustomView *cView = [[CustomView alloc] initWithFrame:CGRectMake(x, y, width, height)];
cView.backgroundColor = [UIColor redColor];
[self.view addSubview:cView];
cView.array = @[@0.1,@0.2,@0.3,@0.4];
dispatch_time_t delayTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(5.0/*延迟执行时间*/ * NSEC_PER_SEC));
dispatch_after(delayTime, dispatch_get_main_queue(), ^{
cView.array = @[@0.25,@0.25,@0.25,@0.25];
});
- UIBezierPath 画矩形直线
UIBezierPath *bezierPath = [UIBezierPath bezierPathWithRect:CGRectMake(20.0f, 40.0f, 20.0f, 2.0f)];
CAShapeLayer *layer = [[CAShapeLayer alloc] init];
layer.path = bezierPath.CGPath;
layer.fillColor = [UIColor orangeColor].CGColor;
[self.view.layer addSublayer:layer];
