swift 获取Documnets 的路径 和 CGD 延迟

 
  // CGD 延迟  
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, Int64(1 * NSEC_PER_SEC)), dispatch_get_main_queue()) { () -> Void in
            
            
            
          
            
            
            // Documnets 的路径
            let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last?.stringByAppendingString("/new.png")
            let path1 = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("new.png")