ios 不區分字串大小寫的比較
阿新 • • 發佈：2019-01-29
- NSString *str;
- // 使用stringWithFormat生成一格式化字串
- str = [NSString stringWithFormat:@"This is %@","John"];
- NSLog(@"str--->%@",str);
- // 字串長度length;
- NSLog(@"The length of this string is %@",[str length]);
- // 字串比較 isEqualToString, 返回NO(false)，isEqualToString區分大小寫
-
BOOL isequal = [str isEqualToString:@"this is John"];
- // 字串序列比列 compare,返回結果NSComparisonResult
- // type enum _NSComparisonResult{
- // NSOrderedAscending = -1,
- // NSOrderedSame,
- // NSOrderedDescending
- // }
- int result = [@"bool" compare:@"cool"];
- NSLog(@"The result is %d",result);
- // compare 比較規則options
-
// NSLiteralSearch 區分大小寫(完全比較)
- // NSCaseInsensitiveSearch 不區分大小寫
- // NSNumericSearch 只比較字串的個數，而不比較字串的字面值
- int result1 = [@"This is John" compare:@"this is John" options:NSCaseInsensitiveSearch | NSNumericSearch];
- NSLog(@"The result is %d",result1);
- // 字串開頭是否包括另一字串 hasPrefix,返回結果YES(true)
-
BOOL isHas = [str hasPrefix:@"This"];
- // 字串結尾是否包括另一字串 hasSuffix,返回結果YES(true)
- BOOL isHas = [str hasSuffix:@"John"];
- // 查詢字串在另一字串中的位置
- NSRange range = [str rangeOfString:@"is" options:NSCaseInsensitiveSearch];
- NSLog(@"The location in the string named 'str' of 'is' is @d",range.location);