iOS 給UI控件畫虛線(帶圓角)

1、創建UIView分類  UIView+Extension.h

在.h文件 聲明方法如下：

/**

 * 給UI控件畫虛線

 * @param lineColor 虛線顏色

 * @param fillColor 填充色

 * @param radius 虛線圓角

 * @param lineWidth 虛線寬度

 * @param type 虛線類型  "butt", "round" and "square"

 * @return 返回 生成的虛線view

 */

- (UIView *)drawDotLineWithLineColor:(UIColor *)lineColor withFillColor:(UIColor *)fillColor withCornerRadius:(CGFloat)radius withLineWidth:(CGFloat)lineWidth AndLineType:(NSString *)type;

2、在.m文件 實現方法如下

//虛線

- (UIView *)drawDotLineWithLineColor:(UIColor *)lineColor withFillColor:(UIColor *)fillColor withCornerRadius:(CGFloat)radius withLineWidth:(CGFloat)lineWidth AndLineType:(NSString *)type {

    

    CAShapeLayer *shapeLayer = [CAShapeLayer layer];

    

    shapeLayer.strokeColor = lineColor.CGColor;

    

    shapeLayer.fillColor = fillColor.CGColor;

    

    UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:self.bounds cornerRadius:radius];

    

    shapeLayer.path = path.CGPath;

    

    shapeLayer.frame = self.bounds;

    

    shapeLayer.lineWidth = lineWidth;

    

    if (type) {

        shapeLayer.lineCap = type;

    }else{

        shapeLayer.lineCap = @"square";

    }

    //虛線每段長度和間隔

    shapeLayer.lineDashPattern = @[@(2), @(2)];

    [self.layer addSublayer:shapeLayer];

    return self;

}

使用到虛線的時候 使用UI對象直接調用上面方法即可如：

[label drawDotLineWithLineColor:[UIColor redColor] withFillColor:[UIColor clearColor] withCornerRadius:2 withLineWidth:1 AndLineType:nil];