iOS开发—Swift时间戳转换方法

Swift实现简单时间戳转换

发布时间戳与当前时间比较：几秒前……天前。

• swift语法
• 时间戳转化

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代码块

• createdTime：发布时间戳

//Swift时间戳转化方法func timestamp() -> String {    var timestamp = String()    var now = time_t()    time(&now)    //createdTime发布时间戳    var distance = Int(difftime(now, createdTime))    if distance < 0 {        distance = 0    }    if distance < 60 {        timestamp = NSString(format: "%d%@", distance, (distance == 1) ? "秒前" : "秒前") as String    }    else if distance < 60 * 60 {        distance = distance / 60        timestamp = String(format: "%d%@", distance, (distance == 1) ? "分钟前" : "分钟前")    }    else if distance < 60 * 60 * 24 {        distance = distance / 60 / 60        timestamp = String(format: "%d%@", distance, (distance == 1) ? "小时前" : "小时前")    }    else if distance < 60 * 60 * 24 * 7 {        distance = distance / 60 / 60 / 24        timestamp = String(format: "%d%@", distance, (distance == 1) ? "天前" : "天前")    }    else if distance < 60 * 60 * 24 * 7 * 4 {        distance = distance / 60 / 60 / 24 / 7;        timestamp = String(format:"%d%@", distance, (distance == 1) ? "周前" : "周前")    }    else {        let dateFormatter = NSDateFormatter()        if dateFormatter == "" {            let dateFormatter = NSDateFormatter()            dateFormatter.timeStyle = .ShortStyle            dateFormatter.dateStyle = .ShortStyle        }        let date = NSDate(timeIntervalSince1970: createdTime)        timestamp = dateFormatter.stringFromDate(date)    }    return timestamp}

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