可变字符串

标签：objective-c   ios开发   ios   文件写入   foundation框架   

#import <Foundation/Foundation.h>
//创建可变字符串
int main(int argc, const char * argv[])
{

    @autoreleasepool {
        NSString * str1 = @"baidu";
        
        NSMutableString * str =[[NSMutableString alloc]initWithString:@"baidu"];
        NSLog(@"%p %p",str1,str);
        
        NSMutableString * str2 = [[NSMutableString alloc]init];
        [str setString:@"baidu"];
        NSLog(@"%@",str2);
        //在字符串末尾追加字符串
        [str2 appendString:@"百度"];
        
        NSLog(@"%@",str2);
        //在 index 处插入字符串
        [str2 insertString:@"baidu" atIndex:0];
        //[str2 inser]
        NSLog(@"%@",str2);
        
        NSRange range = {3,2};
        [str2 deleteCharactersInRange:range];
        NSLog(@"%@",str2);
        
        //insert
        
        //set2 baidu.com
        [str2 setString:@"baidu"];
        NSUInteger count = [str2 length];
        [str2 insertString:@".com" atIndex:count];
        NSLog(@"%@ str2:",str2);
        
    }
    return 0;
}

可变字符串

标签：objective-c   ios开发   ios   文件写入   foundation框架   

原文地址：http://blog.csdn.net/u012701023/article/details/47052721