iOS-貝塞爾連續曲線

一個曲線

UIColor *color = [UIColor redColor];
    [color set];
    UIBezierPath *path = [UIBezierPath bezierPath];
    ///線的寬度【粗細】
    path.lineWidth = 5;
    ///端點類型
    path.lineCapStyle = kCGLineCapRound;
    ///銜接類型
    path.lineJoinStyle = kCGLineJoinRound;
    ///起點
    [path moveToPoint:CGPointMake(0, 100)];
    [path addCurveToPoint:CGPointMake(200, 100) controlPoint1:CGPointMake(50, 0) controlPoint2:CGPointMake(150, 200)];
    [path stroke];

 圖例：

多個曲線

/**
 貝塞爾曲線
 CGRect
*/  
- (void)draweBezierCurves:(CGRect)rect{
    ///曲線水平位置y坐標
    CGFloat lintY = rect.origin.y;
    ///每個曲線的水平長度【兩個弧度為一個曲線】
    NSInteger lineWidth = 8;
    ///每個曲線的上下頂點與水平位置 距離
    CGFloat lingPeak = 3;
    ///波浪線個數
    NSInteger lineCount = (int)(rect.size.width / lineWidth);
    ///除了整數外，最後一條線的長度【小於 lineWidth】
    CGFloat lastLineWidth = rect.size.width - lineCount*lineWidth;
    ///貝塞爾
    UIBezierPath *path = [UIBezierPath bezierPath];
    ///線的寬度【粗細】
    path.lineWidth = 1;
    ///端點類型
    path.lineCapStyle = kCGLineCapRound;
    ///銜接類型
    path.lineJoinStyle = kCGLineJoinRound;
    ///顏色
    UIColor *color = [UIColor redColor];
    
    [color set];
    for (int i = 0; i < lineCount; i ++) {
        ///起點
        [path moveToPoint:CGPointMake(rect.origin.x + i*lineWidth, lintY)];
        ///三點成線
        [path addCurveToPoint:CGPointMake(rect.origin.x + i*lineWidth + lineWidth, lintY) controlPoint1:CGPointMake(rect.origin.x + i*lineWidth + lineWidth/4, lintY - lingPeak) controlPoint2:CGPointMake(rect.origin.x + i*lineWidth + (lineWidth/4)*3, lintY + lingPeak)];
    }
    
    if (lastLineWidth > 0) {
        ///起點
        [path moveToPoint:CGPointMake(rect.origin.x + lineCount*lineWidth, lintY)];
        ///三點成線
        [path addCurveToPoint:CGPointMake(rect.origin.x + lineCount*lineWidth + lastLineWidth, lintY) controlPoint1:CGPointMake(rect.origin.x + lineCount*lineWidth + lastLineWidth/4, lintY - lingPeak) controlPoint2:CGPointMake(rect.origin.x + lineCount*lineWidth + (lastLineWidth/4)*3, lintY + lingPeak)];
        
    }
    [path stroke];
}

 圖例：