沙盒下主要有四个文件夹:document,caches,tmp,library
document 的路径 程序运行时生成的文件,这个文件不要存比较放大的文件,比如音频,视频类,因为这里的东西会被上传
caches 的路径 一般用于文件的下载,存储(不会被上传)
tmp 临时文件.程序结束后应该清空
沙盒文件夹路径获取:
获取沙盒路径:
NSString *sandBoxPath = NSHomeDirectory();
获取 document :
NSString *documentPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[];
获取 caches 路径:
NSString *cacherPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[];
获取 tmp 路径:
NSString *tmpPath = NSTemporaryDirectory();
在沙盒下创建文件:
1.获取路径
2.拼接文件名(包括后缀)
3.将内容写到文件
例:写一个 txt 文件:
//NSString 写入
NSString *str = @"二*";
//获取 document 路径
NSString *docPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[];
//拼接上一个 txt 文件
NSString *filePath = [docPath stringByAppendingPathComponent:@"coco.txt"];
//吧字符串写到 txt 文件
[str writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
例:写一个 array 文件:
//NSArray
NSArray *array = @[@"二*",@"三*",@"翠花",@"叶良岑",@"赵日天",@"王尼玛"];
NSString *tmpPath1 = NSTemporaryDirectory();
NSString *tmpFilePath = [tmpPath1 stringByAppendingPathComponent:@"tmp.plist"];
[array writeToFile:tmpFilePath atomically:YES];
例:写一个 dictionary 文件:
NSDictionary *dic = @{@"1号":@"XXXXX",@"2号":@"XXXXX",@"3号":@"XXXXX",@"4号":@"XXXXX",@"5号":@"XXXXX"};
NSString *dicPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[];
NSString *dicFilePath = [dicPath stringByAppendingPathComponent:@"dic.plist"];
[dic writeToFile:dicFilePath atomically:YES];
例:写一个 image 文件:
NSString *cacherPath2 = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[]; NSString *imgFilePath = [cacherPath2 stringByAppendingPathComponent:@"123.png"];
NSData *data = [[NSData alloc]initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"" ofType:@"png"]]; [data writeToFile:imgFilePath atomically:YES];