//
// main.m
// OC8_NSData
//
// Created by zhangxueming on 15/6/19.
// Copyright (c) 2015年 zhangxueming. All rights reserved.
//
#import <Foundation/Foundation.h>
int main(
int argc,
const char *
argv[]) {
@autoreleasepool {
NSString *
string =
@"i love ios";
//把字符串对象转换成NSData对象
NSData *data = [
string dataUsingEncoding:NSUTF8StringEncoding];
NSLog(@"data = %@", data);
//把NSData类对象转换成字符串对象
NSString *str =
[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"str = %@", str);
//把data对象数据写到指定文件中,文件不存在,则创建指定文件
//- (BOOL)writeToFile:(NSString *)path atomically:(BOOL)useAuxiliaryFile;
BOOL ret = [data writeToFile:
@"/Users/zhangxueming/Desktop/Test/data.txt" atomically:YES];
NSLog(@"ret = %i", ret);
//把文件内容读成二进制对象
NSData *data1 = [NSData dataWithContentsOfFile:
@"/Users/zhangxueming/Desktop/Test/data.txt"];
NSLog(@"data1 = %@", data1);
}
return 0;
}
转载于:https://www.cnblogs.com/0515offer/p/4589593.html
