| Field | Xcode 10.3 GM | Xcode 10.2.1 GM | Diff |
|---|---|---|---|
| Release type | GM | GM | same |
| Edition | - | - | same |
| Release date | 2019-07-22 | 2019-04-17 | different |
| Minimum macOS | 10.14.3 | 10.14.3 | same |
| Swift | 5.0.1 | 5.0.1 | same |
| iOS SDK | 12.4 | 12.2 | different |
| Build | 10G8 | 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。