我们看看如何获取应用程序沙盒目录。包括真机的沙盒的目录。
1、获取程序的Home目录
NSString *homeDirectory = NSHomeDirectory();
NSLog(@"path:%@", homeDirectory);
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打印结果:
2012-06-17 14:00:06.098 IosSandbox[3536:f803] /Users/rongfzh/Library/Application Support/iPhone Simulator/5.1/ Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2 |
那在真机上的目录有是怎么样的呢？我们看看
2012-06-17 14:25:47.059 IosSandbox[4281:f803] /var/mobile/Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2
可见，真机上的目录是/var/mobile/Applications/这个目录下的，和模拟器不一样。这个是Home目录，其他的子目录和模拟器一样。
2、获取document目录
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [paths objectAtIndex:0];
NSLog(@"path:%@", path);
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打印结果
2012-06-17 14:00:06.099 IosSandbox[3536:f803] path:/Users/rongfzh/Library/Application Support/iPhone Simulator/5.1 /Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2/Documents |
3、获取Cache目录
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *path = [paths objectAtIndex:0];
NSLog(@"%@", path);
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打印结果:
2012-06-17 14:03:50.431 IosSandbox[3628:f803] /Users/rongfzh/Library/Application Support/iPhone Simulator/5.1 /Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2/Library/Caches |
4、获取Library目录
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *path = [paths objectAtIndex:0];
NSLog(@"%@", path);
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打印结果:
2012-06-17 14:07:17.544 IosSandbox[3733:f803] /Users/rongfzh/Library/Application Support/iPhone Simulator/5.1 /Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2/Library |
5、获取Tmp目录
NSString *tmpDir = NSTemporaryDirectory();
NSLog(@"%@", tmpDir);
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打印结果:
2012-06-17 14:08:07.824 IosSandbox[3782:f803] /var/folders/g7/246bh79130zblw0yjjtc55cw0000gn/T/ |
6、写入文件
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docDir = [paths objectAtIndex:0];
if (!docDir) {
NSLog(@"Documents 目录未找到");
}
NSArray *array = [[NSArray alloc] initWithObjects:@"内容",@"content",nil];
NSString *filePath = [docDir stringByAppendingPathComponent:@"testFile.txt"];
[array writeToFile:filePath atomically:YES];
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注：我们在真机上也运行一下，把文件写入，下一步从真机上把内容读取出来。
写入输入 array ,里面是两个字符串，一会我们读出来打印。
写入我们在程序沙盒目录下看到文件 testFile.txt
打开文件看到的内容是这样的,是个xml格式的plist文件，数据格式保存了内容。
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <array> <string>内容</string> <string>content</string> </array> </plist> |
7、读取文件
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docDir = [paths objectAtIndex:0];
NSString *filePath = [docDir stringByAppendingPathComponent:@"testFile.txt"];
NSArray *array = [[NSArray alloc]initWithContentsOfFile:filePath];
NSLog(@"%@", array);
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打印结果：
把上面的文件解析后，把内容打印出来了。
2012-06-17 14:14:46.249 IosSandbox[3918:f803] (
"\U5185\U5bb9",
content
)
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真机上读取并打印文件路径：
2012-06-17 14:25:47.059 IosSandbox[4281:f803] /var/mobile/Applications/3B8EC78A-5EEE-4C2F-B0CB-4C3F02B996D2/Documents/testFile.txt
(
"\U5185\U5bb9",
content
)
真机上也能写入和打印。
IOS学习之IOS沙盒(sandbox)机制和文件操作(二)
时间： 2024-10-01 04:08:49