libr-ios/librx/DateUtil.swift

//
//  DateUtil.swift
//  librx
//
//  Created by Yunlong Zheng on 15/10/6.
//  Copyright © 2015年 librx. All rights reserved.
//

import Foundation


struct DateUtil {
    static func format(dateString: String) -> String {
        return dateString.componentsSeparatedByString("+")[0].componentsSeparatedByString(".")[0].componentsSeparatedByString("T").joinWithSeparator(" ")
    }
    
    static func timeDiff(formatterDateStr: String) -> String {
        
        let now: NSDate = NSDate()
        
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        
        let eventDate = dateFormatter.dateFromString(formatterDateStr)
       
        if eventDate==nil {
            return ""
        }
        
        let second = now.timeIntervalSinceDate(eventDate!)
        
        if second >= 60 && second < 3600{
            
            return String(Int(second/60)) + "分钟前"
            
        } else if second >= 3600 && second < 84600{
            
            return String(Int(second/3600)) + "小时前"
            
        } else if second >= 84600 && second < 84600*30{
            return String(Int(second/84600)) + "天前"
        } else {
            return String(Int(second/(84600*30))) + "月前"
        }

    }
}