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Object-C中的字符串對象2-可變字符串
//
// main.m
// 字符串-可變字符串
//
// Created by zhangqs008 on 14-2-13.
// Copyright (c) 2014年 zhangqs008. All rights reserved.
//
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[])
{
@autoreleasepool {
NSString *str1=@"this is string A";
NSString *search;
NSString *replace;
NSMutableString *mutableStr;
NSRange subStr;
//01.從不可變字符串創建可變字符串
mutableStr=[NSMutableString stringWithString:str1];
NSLog(@"01 %@",mutableStr);
//02.插入字符,注意：是直接修改的字符串對象，無返回值
[mutableStr insertString:@" mutable" atIndex:7];
NSLog(@"02 %@",mutableStr);
//03.插入末尾進行有效拚接
[mutableStr insertString:@" and string B" atIndex:[mutableStr length]];
NSLog(@"03 %@",mutableStr);
//04.直接用appendString
[mutableStr appendString:@" and string C"];
NSLog(@"04 %@",mutableStr);
//05.根據範圍刪除字符串 deleteCharactersInRange（從*開始，刪除*個字符）
[mutableStr deleteCharactersInRange:NSMakeRange(16,13)];
NSLog(@"05 %@",mutableStr);
//06.查找然後將其刪除
subStr=[mutableStr rangeOfString:@"string B and "];
if(subStr.location!=NSNotFound)
{
[mutableStr substringWithRange:subStr];
NSLog(@"06 %@",mutableStr);
}
//07.直接設置為可變字符串
[mutableStr setString:@"this is string A"];
NSLog(@"07 %@",mutableStr);
//08.替換一些字符
[mutableStr replaceCharactersInRange:NSMakeRange(8, 8) withString:@"a mutable string"];
NSLog(@"08 %@",mutableStr);
//09.查找和替換
search=@"this is";
replace=@"An example of";
subStr=[mutableStr rangeOfString:search];
if(subStr.location!=NSNotFound)
{
[mutableStr replaceCharactersInRange:subStr withString:replace];
NSLog(@"09 %@",mutableStr);
}
//10.查找和替換所有匹配項
search=@"a";
replace=@"X";
subStr=[mutableStr rangeOfString:search];
while (subStr.location!=NSNotFound) {
[mutableStr replaceCharactersInRange:subStr withString:replace];
subStr=[mutableStr rangeOfString:search];
}
NSLog(@"10 %@",mutableStr);
//也可以這樣寫
[mutableStr replaceOccurrencesOfString:search withString:replace options:nil range:NSMakeRange(0, [mutableStr length])];
NSLog(@"10 %@",mutableStr);
}
return 0;
}
輸出結果：
2014-02-13 20:38:30.074 05.字符串-可變字符串[997:303] 01 this is string A
2014-02-13 20:38:30.076 05.字符串-可變字符串[997:303] 02 this is mutable string A
2014-02-13 20:38:30.079 05.字符串-可變字符串[997:303] 03 this is mutable string A and string B
2014-02-13 20:38:30.079 05.字符串-可變字符串[997:303] 04 this is mutable string A and string B and string C
2014-02-13 20:38:30.080 05.字符串-可變字符串[997:303] 05 this is mutable string B and string C
2014-02-13 20:38:30.080 05.字符串-可變字符串[997:303] 06 this is mutable string B and string C
2014-02-13 20:38:30.081 05.字符串-可變字符串[997:303] 07 this is string A
2014-02-13 20:38:30.081 05.字符串-可變字符串[997:303] 08 this is a mutable string
2014-02-13 20:38:30.081 05.字符串-可變字符串[997:303] 09 An example of a mutable string
2014-02-13 20:38:30.082 05.字符串-可變字符串[997:303] 10 An exXmple of X mutXble string
2014-02-13 20:38:30.082 05.字符串-可變字符串[997:303] 10 An exXmple of X mutXble string
Program ended with exit code: 0
最後更新：2017-04-03 12:55:06