如何将NSString作为.txt文件保存在我的应用程序本地文档目录中？

Question

如何在我的应用程序本地文档目录（UTF-8）上将NSString保存为.txt文件？

Answer 1

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents directory 

NSError *error; 
BOOL succeed = [myString writeToFile:[documentsDirectory stringByAppendingPathComponent:@"myfile.txt"] 
     atomically:YES encoding:NSUTF8StringEncoding error:&error]; 
if (!succeed){ 
    // Handle error here 
} 

Answer 2

你可以使用NSUserDefaults的

节能：

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults]; 
[prefs setObject:@"TextToSave" forKey:@"keyToLookupString"]; 

阅读：

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults]; 
NSString *myString = [prefs stringForKey:@"keyToLookupString"]; 

Answer 3

事情是这样的：

NSString *homeDirectory; 
homeDirectory = NSHomeDirectory(); // Get app's home directory - you could check for a folder here too. 
BOOL isWriteable = [[NSFileManager defaultManager] isWritableFileAtPath: homeDirectory]; //Check file path is writealbe 
// You can now add a file name to your path and the create the initial empty file 

[[NSFileManager defaultManager] createFileAtPath:newFilePath contents:nil attributes:nil]; 

// Then as a you have an NSString you could simple use the writeFile: method 
NSString *yourStringOfData; 
[yourStringOfData writeToFile: newFilePath atomically: YES]; 

Answer 4

他是如何将NSString保存到Documents文件夹中的。保存其他类型的数据也可以通过这种方式实现。

- (void)saveStringToDocuments:(NSString *)stringToSave { 

NSString *documentsFolder = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; 
NSString *fileName = [NSString stringWithString:@"savedString.txt"]; 

NSString *path = [documentsFolder stringByAppendingPathComponent:fileName]; 

[[NSFileManager defaultManager] createFileAtPath:path contents:[stringToSave dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; 
} 

Answer 5

我正在使用此方法将一些base64编码图像数据保存到磁盘。在我的电脑上打开文本文件时，由于一些换行符和返回被自动添加，我一直无法读取数据。

下面的代码修复此问题：

myString = [myString stringByReplacingOccurrencesOfString:@"\n" withString:@""]; 
myString = [myString stringByReplacingOccurrencesOfString:@"\r" withString:@""]; 

// write string to disk