我正在尝试将字符串写入文件并将其存储在我的应用程序内的 applicationSupport 文件夹中。但我的 NSLog() 语句不会在调试器中记录任何内容。我尝试用调试器检查它，我可以看到内容为零，所以我猜测这就是它不输出任何内容的原因，但我不知道为什么它设置为零。有人能看到我的错误吗？
NSString *document = [[[[[[[[description stringByAppendingString:@" "]stringByAppendingString:focus]stringByAppendingString:@" "]stringByAppendingString:level]stringByAppendingString:@" "]stringByAppendingString:equipment]stringByAppendingString:@" "]stringByAppendingString:waterDepth];
//NSLog(@"%@", document);
//get the documents directory:
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *supportDirectory = [paths objectAtIndex:0];
//filename
NSString *filename = [NSString stringWithFormat:[_nameTextField.text stringByAppendingString:@".txt"], supportDirectory];
[document writeToFile:filename atomically:NO encoding:NSStringEncodingConversionAllowLossy error:nil];
NSString *content = [[NSString alloc]initWithContentsOfFile:filename usedEncoding:nil error:nil];
NSLog(@"%@", content);
最佳答案
文件名错误。它应具有以下格式:“directory/file.extension”。您可以使用方法stringByAppendingPathComponent和 stringByAppendingPathExtension构造这样一个字符串。
NSString *filename = [supportDirectory stringByAppendingPathComponent:[_nameTextField.text stringByAppendingPathExtension:@"txt"]];
此外，作为旁注，第一行应使用 stringWithFormat 重写，如下所示:
NSString *document = [NSString stringWithFormat:@"%@ %@ %@ %@ %@", description, focus, level, equipment, waterDepth];
关于objective-c - 将 NSString 写入文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10352665/