First Launch Experience
Launch time is your first opportunity to onboard new users and reconnect with returning ones. Design a launch experience that’s fast, fun, and educational.
启动时间是你第一次有机会展现给新用户和重新连接回归的用户。设计一个快速的、有趣的、有教育意义的启动体验。
Provide a launch screen.A launch screen appears the moment your app starts, giving the impression that your app is fast and responsive, while allowing initial content to load. This screen is quickly replaced by the first screen of your app, so it is should closely resemble this screen with the exception of localizable text and interactive elements. To learn more, seeLaunch Screen.
提供一个启动屏幕。一个启动屏幕出现在你app开始的时刻，当允许初始内容加载的时候给你的app留下快速响应的印象。这个屏幕迅速被你的app第一屏幕代替，除了本地化文本和交互元素，所以你应该类似与这个屏幕。
Launch in the appropriate orientation.If your app supports both portrait and landscape modes, it should launch using the device’s current orientation. If your app only runs in one orientation, it should always launch in that orientation and let people rotate the device if necessary. Unless there’s a compelling reason not to, an app in landscape mode should orient itself correctly, regardless of whether the Home button is on the left or right. For additional guidance, seeLayout.
在合适的方向启动。如果你的app支持直摆和横摆两种模式，它应该用设备当前的方向。如果你的app只运行在一个方向，它应该一直运行在那个方向，如有必要允许用户旋转设备。除非有一个强烈的理由不这么做，一款app在横摆模式时应该正确地确定它的方向，不管Home键是在左边或右边。For additional guidance, seeLayout.
Get to the action quickly.Avoid showing a splash screen, menus, and instructions that make it take longer to reach content and start using your app. Instead, let people dive right in. If your app needs tutorials or intro sequences, provide a way to skip them and don't show them to returning users.
快速到达操作界面。避免显示一个溅开的屏幕、菜单和说明，使得启动画面花费很久才到达内容和开始使用的你的app。取而代之，让用户迅速进入。如果你的app需要教程或者介绍顺序，提供一种方式跳过它们，不要向再次进入的用户显示它们。
Anticipate the need for help.Proactively look for times when people might be stuck. A game, for example, could casually show useful tips when paused or when a character isn’t advancing. Let users replay tutorials in case they miss something the first time.
预期帮助的需求。当用户被卡住时提供前摄观看。一款游戏，例如，可以临时显示有用的建议当暂停或者一个角色不前进时。如果他们在第一次丢失一些信息时让用户能重放教程。
Stick to the essentials in tutorials.It’s fine to provide guidance for beginners, but education isn’t a substitute for great app design. First and foremost, make your app intuitive. If too much guidance is needed, revisit the design of your app.
在教程只放最关键的内容。为新手提供指导是很好的，但是教育对于好的app设计不是替代品。首先最重要的是，让你的app直观。如果需要太多指导，考虑重新设计你的app。
Make learning fun and discoverable.Learning by doing is a lot more fun and effective than reading a list of instructions. Use animation and interactivity to teach gradually and in context. Avoid displaying screenshots that appear interactive.
让学习成为一种乐趣和探索。让学习变得有趣和高效，而不是阅读一大串说明。结合上下文用动画和交互来逐步教学。避免显示截屏来显示交互。
Avoid asking for setup information up front.People expect apps to just work. Design your app for the majority and let the few that want a different configuration adjust settings to meet their needs. To the extent possible, derive setup information from device settings and defaults, or through a synchronization service, such as iCloud. If you must ask for setup information, prompt for it in-app the first time, and let users modify it later in your app’s settings.
避免开始就要求设置信息。用户期望app直接工作。为大多数用户区设计你的app，允许一部分有不同需求的用户修改设置。为了可能的范围，继承来自设备的设置和初始值，或者通过如iCloud的同步服务。如果你必须要求设置信息，在第一次启动app时提示，允许之后在你的app中修改设置。
Avoid showing in-app licensing agreements and disclaimers.Let the App Store display agreements and disclaimers before your app is downloaded. If you must include these items within your app, integrate them in a balanced way that doesn’t disrupt the user experience.
避免在app中显示同意和弃权条款。在你的app被下载之前让App Store显示同意和弃权条款。如果你必须在你的app中包括这些条款，用一种平衡的方式集成它而不要破坏用户的体验。
Restore the previous state when your app restarts.Don't make people retrace steps to reach their previous location in your app. Preserve and restore your app’s state so they can continue where they left off.
当你的app重启时恢复之前的状态。不要让用户重新设置来到达他们在你的app中之前的位置。保存和恢复你的app状态那样他们可以在他们离开时的位置继续。
Don’t ask people to rate your app too quickly or too often.Asking for a rating too soon or too frequently is annoying and decreases the amount of useful feedback you receive. To encourage well-considered feedback, give people time to form an opinion about your app before asking for a rating. Always provide a way to opt out of rating prompts and never force users to rate your app.
不要太早或太频繁要求你的用户评价你的app。太早或太频繁要求评价会令人厌烦，也会减少你收到的有用反馈。鼓励深思熟虑的反馈，在要求评价前给用户时间去形成一个关于你的app的观点。一直提供一个方式决定退出评价提示，不要强迫用户评价你的app。
Don’t encourage rebooting.Restarting takes time and makes your app seem unreliable and hard to use. If your app has memory or other issues that make it difficult to run unless the system has just booted, you need to address those issues.
不要鼓励重启。重启花费时间，让你的app看起来不可靠和难以使用。如果你的app有内存或其他问题让它很难运行，除非系统刚刚重启完毕，你需要解决这些问题。
