參考原文：https://www.jianshu.com/p/1dd7745f5ee4

NSStringCompareOptions里有個(gè)NSNumericSearch

?/* Added in 10.2; Numbers within strings are compared using numeric value, that is, Foo2.txt < Foo7.txt < Foo25.txt; only applies to compare methods, not find */

Object-C

NSString *currentVersion = @"1.2.1";NSString *serverVersion = @"1.11.1";if ([currentVersion compare:serverVersion options:NSNumericSearch] == NSOrderedAscending) {NSLog(@"需要更新");}

Swift

let currentVersion = "1.2.1"let serverVersion = "1.11.1"if currentVersion.compare(serverVersion, options: .numeric) == .orderedAscending {print("需要更新")}

?

轉(zhuǎn)載于:https://www.cnblogs.com/liuyongfa/p/9967919.html

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