January 2012
Intermediate to advanced
584 pages
11h 56m
Chinese
Content preview from 操作介面設計模式 第二版
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468
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第十章
範例說明
本書寫作時，這個範例尚未出現太多變化。圖 10-24 的網站範例是兩家大型的搜尋
引擎，他們都在搜尋欄位中安插了清除文字的按鈕。
圖
10
-
24
Google
與
Bing
都使用清除按鈕
下載進度指示器（
Loading Indicators
）
圖
10
-
25
iPhone Stocks
程式正在等待資料傳入
這是什麼
載入一個頁 面或頁面的 某個分區時 ，在即將顯 示內容的地 方（或使用 者點擊的地
方）顯示一個進度指示器。
DI_2e_ch10.indd 468 2012/1/5 下午 04:04:09
模式
|
469
何時使用
當使用者必須等待內容載入時，尤其是回應使用者的互動而會動態改變的頁面中。
為何使用
透過行動網路載入新內容可能很慢而且不穩定。
我們應該盡可能顯示已經部分載入的內容，使用者才能看到真正有用的東西。
一而來說，進度指示器讓使用者覺得下載時間變短了。看到有東西回應手勢，使用
者會感到安心，尤其在指示器出現在手勢下達的地方時。
原理作法
盡可能快速 顯示下載完 成的頁面內 容，但如果 有個部分要 花費比較長 的下載時間
（例如下載圖像或影片），則於該處顯示一個輕量的動畫進度指示器。（行動平台
可能有提供預設的指示器。）
當使用者開始一個造成頁面部分重新載入
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and much more.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.