創建NSString數據並將其保存到文件中

Question

我有3個NSString對象，我想在應用程序運行時保存到新文件。

這將幫助我進行遠程調試！

如果任何人能幫助我創建文件和保存的數據將非常使用全

感謝名單

Answer 1

您可以將文件保存到文檔目錄，這裏是如何得到的路徑目錄：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:fileName]; 

和樣本寫聲明：

NSError *error; 
BOOL status = [string writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:&error]; 

Answer 2

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 } 

source。

Answer 3

在NSString文件存在是名爲writeToFile:atomically:encoding:error:的方法。

NSError *error; 
[@"Write me to file" writeToFile:@"<filepath>" atomically:YES encoding: NSUTF8StringEncoding error:&error]; 

Answer 4

這裏是如何將NSString保存到Documents文件夾中。保存其他類型的數據也可以通過這種方式實現。

- (void)saveString:(NSString *)stringToSave toDocumentsWithFilename:(NSString *)fileName { 

NSString *documentsFolder = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; 
NSString *path = [documentsFolder stringByAppendingPathComponent:fileName]; 

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

} 

用法：

NSString *stringWeWantToSave = @"This is an elephant"; 

NSString *fileName = [NSString stringWithString:@"savedString.txt"]; 

[self saveString:stringWeWantToSave toDocumentsWithFilename:fileName];