我正在使用Xcode 3.2.5.我正在运行iAd.困惑于迟滞的iOs版本 [英] I am using Xcode 3.2.5. I have iAds running. Confused about about targest, iOs versions

问题描述

试图跟上曲线.我读的书太多了，正在发急.是否有一个一站式链接，该链接会告诉我基于包含的框架在所有平台上运行我的应用程序的目标是什么?我大量使用Mapkit，并希望包含iAd.我当前的应用似乎在3G上已失效.

Trying to keep up with the curve. I'm reading almost too much and is sending me in a tail spin. Is there a one stop link which will tell me what my target should be to run my app on all platforms based on what frameworks I have included? I make heavy use of Mapkit, and want to include iAds. My current apps seem dead on 3G.

Apple是否强迫您仅支持最新的iOS?我对此没有问题，但是不确定是否有人拥有古老的3G，如何告诉他们，不，我不支持您的手机，请升级?

Does Apple force you to support only the latest iOS? I have no problem with that, but not sure if someone who has and ancient 3G, how do I tell them, NO I don't support your phone, please upgrade?

推荐答案

将项目的基本SDK设置为最新版本的SDK.将部署目标设置为计划支持的操作系统的最旧版本.您可以使用比部署目标晚的版本中引入的功能，但是在使用它们之前，需要先对其进行检查，否则您的应用程序将崩溃.

Set your project's base SDK to the latest version of the SDK. Set the deployment target to the oldest version of the OS that you plan to support. You can use features introduced in versions later than your deployment target, but you'll need to check for them before you use them, else your app will crash.

阅读每个操作系统版本的发行说明，以了解何时引入了哪些功能.实际上，养成每次发布新版本时都要仔细阅读发行说明的习惯.

Read the release notes for each version of the OS to get a good idea of what features were introduced when. In fact, make it a habit to read the release notes thoroughly each time a new version comes out.

iOS 4.2在iPhone 3G上可以很好地运行，因此没有必要在不久的将来放弃对3G的支持.如果您的应用当前无法在3G上运行，请启动调试器并找出原因.您在该设备上运行什么版本的iOS?它在哪里崩溃?这是典型的调试资料.

iOS 4.2 runs pretty well on an iPhone 3G, so there's no need to drop support for the 3G anytime soon. If your apps currently don't work on the 3G, fire up your debugger and figure out why. What version of iOS are you running on that device? Where does it crash? This is typical debugging stuff.

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