如何將三個文本文件的數據連接/合併到iOS中的一個文本文件中

Question

我遇到了很大的麻煩。我想將多個文本文件的數據連接到另一個文本文件中。但是我不能。你可以幫我嗎 ？非常感謝

Answer 1

閱讀各文件一個接一個，

NSString *firstFileContent = [NSString stringWithContentsOfFile:<your file path> 
                 encoding:NSASCIIStringEncoding 
                  error:nil]; 

//Similarly read other files, and store them in secondFileContent and thirdFileContent. 

//now concatenate all to form one big string. 
NSString *bigString = [NSString stringWithFormat:@"-First File- \n%@ \n-Second File- \n%@\n-Third File-\n%@",firstFileContent, secondFileContent, thirdFileContent]; 

//write to file, create a new one 
[bigString writeToFile:<path to write> 
      atomically:YES 
       encoding:NSASCIIStringEncoding 
       error:nil]; 

編輯1：

根據您的意見，您的文件在DocumentDirectory使用此代碼：您需要閱讀的文本文件，從捆綁，然後添加它們，一旦你有

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:<your file name>]; 
NSString *content = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:NULL]; 

Answer 2

以下代碼 NSString文件和使用

首先加載內容：

NSString *strConcatenate = [NSString stringWithFormat:@"%@ %@ %@", textfiles1, textfiles2, textfiles3];  
    NSLog(@"%@", strConcatenate); 

Answer 3

你只需要在文件的內容加載到NSMutableString和將它們連接起來：

NSMutableString *myString = @"Content of the first file"; 
NSString *test = [myString stringByAppendingString:@" content of the second file"]; 

Answer 4

然後寫回去。我寫了這個例子，我希望你能從中學習。

NSMutableString *mutableString = [[NSMutableString alloc] init]; 

NSArray *textFiles = @[ @"textfile1", @"textfile2", @"textfile3" ]; 

for (NSString *textFileName in textFiles) { 

    NSString *path = [[NSBundle mainBundle] pathForResource:textFileName 
                ofType:@"txt"]; 

    NSError *error = nil; 
    NSString *content = [NSString stringWithContentsOfFile:path 
               encoding:NSUTF8StringEncoding 
                error:&error]; 

    if (content) { 
    [mutableString appendFormat:@"%@\n", content]; 
    } else { 
    NSLog(@"%@", error.localizedDescription); 
    } 

} 

NSLog(@"%@", mutableString); 

NSError *error = nil; 
BOOL result = [mutableString writeToFile:@"concatenated_file.txt" atomically:NO encoding:NSStringEncodingConversionAllowLossy error:&error]; 

if (!result) { 
    NSLog(@"%@", error.localizedDescription); 
}