复制NSString

Question

我想参照目标C中的其他字符串修改一个NSString，有人能帮我吗？

Example1:

a. "ab cd eg"
b. "ctghml"

I want to change string b like "ct gh ml" , in short want to insert space spaces exactly like string a.

Note: Number of letters will be same like (abcdeg).count = 6 and (ctghml).count = 6

Example2:

a. (abcd) edt-tf
b. (lght)ert-tg

I want to change string b like "(lght) ert-tg" , in short want to insert space spaces exactly like string a.

Note: Number of letters will be same without spaces like ((abcd)edt-tf).count = 12 and ((lght)ert-tg).count = 12

谢谢!

Answer 1

NSString *str1 = @"ab cd eg";
NSMutableString *str2 = [@"ctghml" mutableCopy];

for(int i = 0; i < str1.length; i++) {
  unichar c = [str1 characterAtIndex:i];
  if (c == ' ') {
    [str2 insertString:@" " atIndex:i];
  }
}

NSLog(@"%@", str2);