Question

我遇到了大麻烦。我想将多个文本文件的数据连接到另一个文本文件中。但是我不能。你能帮助我吗？非常感谢

Answer 1

逐个阅读每个文件，

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];

修改1 ：

根据您的评论，您的文件位于DocumentDirectory中，请使用以下代码：

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

首先在NSString中加载文件内容并使用以下代码：

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

Answer 3

您只需将文件内容加载到NSMutableString并连接它们：

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

Answer 4

你需要从包中读取文本文件然后附加它们，一旦你有，然后将其写回。我写了这个例子，希望你能从中学习。

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);
}

如何在iOS中将三个文本文件的数据连接/合并为一个文本字段

4 个答案: