Did you see the error message? Your library does not have a minimum supported version set. The library supports at least 9.3, but your app supports at least 7.0, so it cannot be used. Just set "Development Target" to 7.0 in the library's target settings.
In addition, if you are working on a framework, it is recommended to refer to this best practice https://github.com/jverkoey/i...
If you find it troublesome, you can use CocoaPods or Carthage, both of which are very convenient to build and use libraries. You only need to worry about writing code.
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Did you see the error message? Your library does not have a minimum supported version set. The library supports at least 9.3, but your app supports at least 7.0, so it cannot be used.
Just set "Development Target" to 7.0 in the library's target settings.
In addition, if you are working on a framework, it is recommended to refer to this best practice https://github.com/jverkoey/i...
If you find it troublesome, you can use CocoaPods or Carthage, both of which are very convenient to build and use libraries. You only need to worry about writing code.