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OC开发之——NSMutableString(54)

一 概述

NSString与NSMutableString的区别:

  • NSString:不可变字符串
  • NSMutableString:可变字符串

二 示例

2.1 代码

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#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
@autoreleasepool {
// insert code here...
NSMutableString *mus=[NSMutableString stringWithFormat:@"11"];
[mus appendString:@"22 33"];
NSRange range= [mus rangeOfString:@"22"];
[mus deleteCharactersInRange:range];

//NSString
NSString *s2=[NSString stringWithFormat:@"11"];
NSString *s3=[s2 stringByAppendingString:@"22 33"];
NSLog(@"mus=%@,s2=%@,s3=%@",mus,s2,s3);
}
return 0;
}

2.2 输出结果

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NSMultableString[3112:45276] mus=11 33,s2=11,s3=1122 33