OC的字符串操作2

来源：互联网发布：证大财富淘宝贷容易吗编辑：程序博客网时间：2024/05/19 13:28

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        //可变字符串
        NSMutableString *mString=[NSMutableString stringWithString:@"nihao"];

        NSMutableString *mString2=[NSMutableString stringWithFormat:@"hello%d",100];
        NSURL *url=[NSURL URLWithString:@""];
        NSMutableString *mString3=[NSMutableString stringWithContentsOfFile:url encoding:NSUTF8StringEncoding error:nil];
        //可变字符串独特初始化方法，初始化一个空间为100的可变字符串
        NSMutableString *mstring4=[[NSMutableString alloc]initWithCapacity:100];
        //C语言的字符数组转化成OC的字符串
//        [NSString alloc]initWithCharacters:<#(nonnull const unichar *)#> length:<#(NSUInteger)#>
        NSMutableString *targetString=[NSMutableString stringWithString:@"呵呵，我擦"];
        NSRange range=[targetString rangeOfString:@"擦"];
        NSLog(@"%@",[NSValue valueWithRange:range]);

        //替代
        [targetString replaceCharactersInRange:range withString:@"*"];//吧字符替换成想要的字符
        NSLog(@"targetString=%@",targetString);
        //增加
        //在指定位置去插入一个字符串
        [targetString insertString:@"真是日了狗了" atIndex:targetString.length];
        NSLog(@"targetString=%@",targetString);
        //在字符串的末尾添加一个字符串
        [targetString appendString:@",byebye"];
        NSLog(@"targetString=%@",targetString);
        [targetString appendFormat:@"%@%@",@",your mother",@" boom boom"];
        NSLog(@"targetString=%@",targetString);
        //删除
        [targetString deleteCharactersInRange:NSMakeRange(0, 3)];
        NSLog(@"targetString=%@",targetString);

    }
    return 0;
}

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