swift 4.0宏定义

// 通过 red 、 green 、blue 、alpha 颜色数值

publicletRGBAlpa:((Float,Float,Float,Float) ->UIColor) = { (r:Float, g:Float, b:Float, a:Float) ->UIColorin

    returnUIColor.init(red:CGFloat(CGFloat(r)/255.0), green:CGFloat(CGFloat(g)/255.0), blue:CGFloat(CGFloat(b)/255.0), alpha:CGFloat(a))

}

// 通过 十六进制与alpha来设置颜色值  HexRGBAlpha(0xe47833,1)

publicletHexRGBAlpha:((Int,Float) ->UIColor) = { (rgbValue :Int, alpha :Float) ->UIColorin

    returnUIColor(red:CGFloat(CGFloat((rgbValue & 0xFF0000) >> 16)/255), green:CGFloat(CGFloat((rgbValue & 0xFF00) >> 8)/255), blue:CGFloat(CGFloat(rgbValue & 0xFF)/255), alpha:CGFloat(alpha))

}

extension String {

    /// 计算文本的高度

    functextHeight(fontSize:CGFloat,width:CGFloat) ->CGFloat{

        returnself.boundingRect(with:CGSize(width: width, height:CGFloat(MAXFLOAT)), options: .usesLineFragmentOrigin, attributes: [.font:UIFont.systemFont(ofSize: fontSize)], context:nil).size.height

    }

    /// 计算文本宽度

    functextWidth(fontSize:CGFloat,height:CGFloat) ->CGFloat{

        returnself.boundingRect(with:CGSize(width:CGFloat(MAXFLOAT), height:height ), options: .usesLineFragmentOrigin, attributes: [.font:UIFont.systemFont(ofSize: fontSize)], context:nil).size.width

    }

    /// 计算加粗文本的高度

    functextBlodHeight(fontSize:CGFloat,width:CGFloat) ->CGFloat{

        returnself.boundingRect(with:CGSize(width: width, height:CGFloat(MAXFLOAT)), options: .usesLineFragmentOrigin, attributes: [.font:UIFont.boldSystemFont(ofSize: fontSize)], context:nil).size.height

    }

    /// 计算加粗文本宽度

    functextBlodWidth(fontSize:CGFloat,height:CGFloat) ->CGFloat{

        returnself.boundingRect(with:CGSize(width:CGFloat(MAXFLOAT), height:height ), options: .usesLineFragmentOrigin, attributes: [.font:UIFont.boldSystemFont(ofSize: fontSize)], context:nil).size.width

    }

}

喜欢的话，可以看我其他文章哦，别忘了点歌👍哦