objective c - how to get first three characters of an NSString?

Question

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

How can I return the first three characters of an NSString?

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1 Answer

深蓝 · Answer 1 · 2021-10-23T17:44:35+0000

 mystr=[mystr substringToIndex:3];

Be sure your string has atleast 3 ch.. o.e. it will crash the app.

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