![]() If you are creating a new text file or overwriting an existing text file, use the Create shared method of the TextOutputStream class. Once you have a FolderItem that represents the text file you wish to open and write to, you open the file using the Append shared method of the TextOutputStream class. You can also specify the text encoding by passing the encoding as an optional parameter to Read or ReadAll. Use it whenever you need to specify an encoding. The Encodings module provides access to all encodings. The code assumes that there is a File Type Set in the project named TextTypes: The string containing the text will use the specified encoding until it is specifically changed to something else. Here is the above code, amended to specify the text encoding of the incoming text stream to UTF8, which is the most common text encoding. When you read text, you can set the Encoding property of the TextInputStream to the encoding of the text file. This is because the character codes above ACSII 127 may differ from what your app expects. However, if the files are coming from other apps or platforms, in other languages or a mixture of languages, then you need to specify the encoding of the text. If you are reading and writing text files with only your app, this code will work. It assumes that the valid text file types have been defined in a File Type Set called TextTypes:į = SpecialFolder. This code lets the user choose a text file using the Open-file dialog box and displays the text in a TextArea. When you are finished reading text from the file, call the TextInputStream’s Close method to close the stream to the file, making the file available to be opened again. This property will be True when the end of the file has been reached. As you read text, you can determine if you have reached the end of the file by checking the TextInputStream’s EOF (end of file) property. The ReadLine method returns the next line of text (the text after the last character read but before the next end of line character). The TextInputStream.ReadAll method returns all the text from the file (via the TextInputStream) as a String. The TextInputStream keeps track of the last position in the file you read from. You then use ReadAll or ReadLine methods of the TextInputStream to get the text from the text file. This is a special class of object designed specifically for reading text from text files. This method is a function that returns a “stream” that carries the text from the text file to your application. Once you have a FolderItem that represents an existing text file you wish to open, you open the file using the Open shared method of the TextInputStream class. Refer to UserGuide:iOS Files for information on using text files in iOS projects. With iOS projects you would instead use the Xojo.IO.TextInputStream and Xojo.IO.TextOutputStream classes. Use TextOutputStream to write data to text files. As you might expect, use TextInputStream to read data from text files. There are two text stream classes: TextInputStream and TextOutputStream. Text Streams are used to read or write data to text files. ![]() Whether you are going to read from a text file or write to a text file, you must first have a FolderItem that represents the file you are going to read from or write to. Text files are convenient since they can also be read by many other apps. Text files can easily be created, read from, or written to by your apps. TIS = Xojo.IO.TextInputStream.Open( JSONFile, 8)Ĭatch err As files can be read by text editors (like TextEdit, NotePad, gedit, and BBEdit) and word processors (like Microsoft Word and Pages). Dim MyJSONfile As FolderItem = ("json.txt")ĭim JSONFile As New Xojo.IO.FolderItem( MyJSONFile.NativePath ) Ok It’s better if you use the new framework for all data reading code. ReadAll is a method I made to extend it to the folderitem, and not only the textinputstream. If inputFilenil thenĭim jsonString As String = inputFile.ReadAll(Encodings.UTF8)
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