| Field | Xcode 9.3 | Xcode 9.3.1 | Diff |
|---|---|---|---|
| Release type | stable | stable | same |
| Edition | - | - | same |
| Release date | 2018-03-29 | 2018-05-10 | different |
| Minimum macOS | 10.13.2 | 10.13.2 | same |
| Swift | 4.1 | 4.1 | same |
| iOS SDK | 11.3 | 11.3 | same |
| Build | 9E145 | 9E501 | different |
建议：如果你是生产环境主力开发，优先选择 stable 版本；如需验证新 SDK，再考虑 beta。