ios 读取文档文件夹中的文本文件 - Iphone SDK
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Read Text File in Document Folder - Iphone SDK
提问by lab12
I have this code below:
我在下面有这个代码：
NSString *fileName = [[NSUserDefaults standardUserDefaults] objectForKey:@"recentDownload"];
NSString *fullPath = [NSBundle pathForResource:fileName ofType:@"txt" inDirectory:[NSHomeDirectory() stringByAppendingString:@"/Documents/"]];
NSError *error = nil;
[textViewerDownload setText:[NSString stringWithContentsOfFile:fullPath encoding: NSUTF8StringEncoding error:&error]];
textviewerdownloadis thetextviewdisplaying the text from the file. The actual file name is stored in anNSUserDefaultcalledrecentDownload.When I build this, I click the
buttonwhich this is under, and my applicationcrashes.Is there anything wrong with the syntax or just simple error?
textviewerdownload是textview显示文件中的文本。实际文件名存储在一个NSUserDefault被调用的recentDownload.当我构建它时，我单击
button它下面的 ，然后我的应用程序crashes.语法有什么问题还是只是简单的错误？
回答by jlehr
The NSBundleclass is used for finding things within your applications bundle, but the Documents directory is outside the bundle, so the way you're generating the path won't work. Try this instead:
在NSBundle类用于在应用程序中找到的东西捆绑，但文件目录是包外，所以这样你正在生成的路径将无法正常工作。试试这个：
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask,
YES);
NSString *fullPath = [[paths lastObject] stringByAppendingPathComponent:@"recentDownload.txt"];
回答by iOS
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *myPathDocs = [documentsDirectory stringByAppendingPathComponent:@"myfile.txt"];
if (![[NSFileManager defaultManager] fileExistsAtPath:myPathDocs])
{
NSString *myPathInfo = [[NSBundle mainBundle] pathForResource:@"myfile" ofType:@"txt"];
NSFileManager *fileManager = [NSFileManager defaultManager];
[fileManager copyItemAtPath:myPathInfo toPath:myPathDocs error:NULL];
}
//Load from File
NSString *myString = [[NSString alloc] initWithContentsOfFile:myPathDocs encoding:NSUTF8StringEncoding error:NULL];
This worked for me
这对我有用
Anyway, thank you all..
不管怎样，谢谢大家。。
