// regularExpress:正则表达式 desString:被查找的字符串
+ (NSString *)matchRegularExpress:(NSString *)regularExpress andDesString:(NSString *)desString { NSError *error; NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:regularExpress options:0 error:&error]; if (regex != nil) { NSTextCheckingResult *firstMatch=[regex firstMatchInString:desString options:0 range:NSMakeRange(0, [desString length])]; if (firstMatch) { NSRange resultRange = [firstMatch rangeAtIndex:0]; NSString *result=[desString substringWithRange:resultRange]; return result; } } return nil; }
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