| Field | Xcode 10.2 Beta 4 | Xcode 10.2.1 GM | Diff |
|---|---|---|---|
| Release type | Beta 4 | GM | different |
| Edition | - | - | same |
| Release date | 2019-03-04 | 2019-04-17 | different |
| Minimum macOS | 10.14.3 | 10.14.3 | same |
| Swift | 5.0 | 5.0.1 | different |
| iOS SDK | 12.2 | 12.2 | same |
| Build | 10P107d | 10E1001 | 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。