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自定義 View,實(shí)現(xiàn)以下方法即可
- (void)drawRect:(CGRect)rect {
// Drawing code
// 初始化UIBezierPath
UIBezierPath *path = [UIBezierPath bezierPath];
// 首先設(shè)置一個(gè)起始點(diǎn)
/////左半邊曲線
CGPoint startPoint = CGPointMake(rect.size.width/2, rect.size.height*0.4);
// 以起始點(diǎn)為路徑的起點(diǎn)
[path moveToPoint:startPoint];
// 設(shè)置一個(gè)終點(diǎn)
CGPoint endPoint = CGPointMake(rect.size.width/2, rect.size.height- rect.size.height*0.1);
// 設(shè)置第一個(gè)控制點(diǎn)
CGPoint controlPoint1 = CGPointMake(self.bounds.size.width*0.1, rect.size.height*0.1);
// 設(shè)置第二個(gè)控制點(diǎn)
CGPoint controlPoint2 = CGPointMake(0, self.size.height*0.7);
// 添加三次貝塞爾曲線
[path addCurveToPoint:endPoint controlPoint1:controlPoint1 controlPoint2:controlPoint2];
// 設(shè)置另一個(gè)起始點(diǎn)
[path moveToPoint:endPoint];
//右半邊曲線>>>>>>>>>>>>>>>>>>>>
// 設(shè)置第三個(gè)控制點(diǎn)
CGPoint controlPoint3 = CGPointMake(rect.size.width-self.bounds.size.width*0.1, rect.size.height*0.1);
// 設(shè)置第四個(gè)控制點(diǎn)
CGPoint controlPoint4 = CGPointMake(rect.size.width, self.size.height*0.7);
// 添加三次貝塞爾曲線
[path addCurveToPoint:startPoint controlPoint1:controlPoint4 controlPoint2:controlPoint3];
// 設(shè)置線寬
path.lineWidth = 3;
// 設(shè)置線斷面類型
path.lineCapStyle = kCGLineCapRound;
// 設(shè)置連接類型
path.lineJoinStyle = kCGLineJoinRound;
// 設(shè)置畫筆顏色
[[UIColor redColor] set];
[path stroke];
UIView *heart = [[UIView alloc] init];
heart.frame = CGRectMake(0, 0, 20 , 20);
heart.backgroundColor =[UIColor redColor];
[self addSubview:heart];
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
// 設(shè)置動(dòng)畫的路徑為心形路徑
animation.path = path.CGPath;
// 動(dòng)畫時(shí)間間隔
animation.duration = 3.0f;
// 重復(fù)次數(shù)為最大值
animation.repeatCount = FLT_MAX;
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
//設(shè)置加速度
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
// 將動(dòng)畫添加到動(dòng)畫視圖上
[heart.layer addAnimation:animation forKey:nil];
}
Demo地址:https://github.com/yuying2012/WJDStudyLibrary
這是一個(gè)大工程,請(qǐng)從工程中尋找相關(guān)模塊代碼.
