ios - 如何在 iOS 中将三个文本文件的数据连接/合并为一个文本文件

Question

我有一个大麻烦。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

逐一读取每个文件，

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];

编辑 1:

根据您的评论，您的文件位于 DocumentDirectory 中，请使用此代码:

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];