//
// main.m
// OC3_Copy及MultableCopy
//
// Created by zhangxueming on 15/6/19.
// Copyright (c) 2015年 zhangxueming. All rights reserved.
//
#import <Foundation/Foundation.h>
//copy mutableCopy
int main(
int argc,
const char *
argv[]) {
@autoreleasepool {
//copy 把可变对象及不可变对象 copy生成不可变对象
NSString *str =
@"hello world";
NSString *str1 =
[str copy];
//[str1 insertString:@"qianfeng" atIndex:4];
NSLog(
@"str = %p str1 = %p", str, str1);
NSLog(@"str1 = %@", str1);
NSMutableString *str2 = [NSMutableString stringWithString:
@"hello world"];
NSString *str3 =
[str2 copy];
//[str3 insertString:@"qianfeng" atIndex:4];
NSLog(
@"str3 = %@", str3);
//mutableCopy 把可变或者不可变对象copy生成可变对象
NSString *str4 =
@"qianfeng";
NSMutableString *str5 =
[str4 mutableCopy];
[str5 insertString:@"hello" atIndex:
4];
NSLog(@"str5 = %@", str5);
NSMutableString *str6 = [NSMutableString stringWithString:
@"qianfeng"];
NSMutableString *str7 =
[str6 mutableCopy];
[str7 insertString:@"world" atIndex:
4];
NSLog(@"str7 = %@", str7);
}
return 0;
}
转载于:https://www.cnblogs.com/0515offer/p/4589556.html
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