iOS plist存储

2023-07-24  本文已影响0人  清风_____
沙盒介绍

Documents:用于存储用户数据,可被iTunes备份
Library:包含两个子目录
可创建子文件夹。可以用来放置您希望被备份但不希望被用户看到的数据。该路径下的文件夹,除Caches以外,都会被iTunes备份。
Caches:适合存储体积大,不需要备份的非重要数据
Preferences:通常保存应用的设置信息(NSUserDefaults)
tmp:用于存放临时文件,不会被iTunes备份

//document文件夹路径
#define PATH_AT_Document(name) [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:name]
//temp文件夹路径
#define PATH_AT_Tmp(name) [NSTemporaryDirectory() stringByAppendingPathComponent:name]
//cache文件夹路径
#define PATH_AT_Cache(name) [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:name]
//Libary文件夹路径
#define PATH_AT_Library(name) [[NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:name]
    //2.1 plist文件的创建与删除
    NSFileManager *manager = [NSFileManager defaultManager];
    // 获取文件路径 Documents
    NSString *plistPath = PATH_AT_Document(@"tst.plist");
    // 开始创建文件
    [manager createFileAtPath:plistPath contents:nil attributes:nil];
    // 移除文件
    //[manager removeItemAtPath:plistPath error:nil];
    
    //2.2 plist 存储/读取字典数据
    // 存储
    NSDictionary *writeDic = @{
        @"a": @"aaa",
        @"b": @"bbb",
        @"c": @"ccc",
        @"d": @"ddd"
    };
    [writeDic writeToFile:plistPath atomically:YES];
    
    // 读取
    NSDictionary *readDic = [NSDictionary dictionaryWithContentsOfFile:plistPath];
    NSLog(@"plist - 读取字典数据:%@", readDic);

    //2.3 plist 存储/读取数组数据
    NSArray *writeArray = @[@"a", @"b", @"c", @"d", @"e"];
    // 存储
    [writeArray writeToFile:plistPath atomically:YES];
    // 读取
    NSArray *readArray = [NSArray arrayWithContentsOfFile:plistPath];
    NSLog(@"plist - 读取数组数据: %@", readArray);

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