OC5_NSMutableString操作

//

//  main.m

//  OC5_NSMutableString操作

//

//  Created by zhangxueming on 15/6/10.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import <Foundation/Foundation.h>

//NSMutableString 继承与NSString

//所有NSString类的方法NSMutableString 都可以使用



int main(int argc, const char * argv[]) {

    @autoreleasepool {

        //创建指定容量大小的可变字符串对象

        //+ (NSMutableString *)stringWithCapacity:(NSUInteger)capacity;

        NSMutableString *mulStr1 = [[NSMutableString alloc] initWithCapacity:20];

        NSLog(@"mulStr1 = %@", mulStr1);

        

        //替换指定范围内的字符

        //- (void)replaceCharactersInRange:(NSRange)range withString:(NSString *)aString;

        NSMutableString *mulStr2 = [[NSMutableString alloc] initWithString:@"hello world qianfeng"];

        [mulStr2 replaceCharactersInRange:NSMakeRange(6, 5) withString:@"welcome"];

        NSLog(@"mulStr2 = %@", mulStr2);

        

        //在指定位置增加字符串

        NSMutableString *mulStr3 = [[NSMutableString alloc] initWithFormat:@"千锋中国"];

        [mulStr3 insertString:@"hello world" atIndex:2];

        NSLog(@"mulStr3 = %@", mulStr3);

        

        //删除指定范围内的字符

        NSMutableString *mulStr4 = [NSMutableString stringWithUTF8String:"千锋hello world中国"];

        [mulStr4 deleteCharactersInRange:NSMakeRange(2, 11)];

        NSLog(@"mulStr4 = %@", mulStr4);

        

        //追加字符串

        NSMutableString *mulStr5 = [NSMutableString stringWithString:@"helloworld"];

        [mulStr5 appendString:@"qianfeng"];

        NSLog(@"mulStr5 = %@", mulStr5);

        

        //格式化追加字符串

        NSMutableString *mulStr6 = [NSMutableString stringWithFormat:@"%s%d", "hello", 12345];

        [mulStr6 appendFormat:@"%.2f%@", 3.14, @"world"];

        NSLog(@"mulStr6 = %@", mulStr6);

        

        //修改字符串

        NSMutableString *mulStr7 = [[NSMutableString alloc] initWithString:@"hello world"];

        [mulStr7 setString:@"qianfeng"];

        NSLog(@"mulStr7 = %@", mulStr7);

        

    }

    return 0;

}