Question

下面的代码打开一个文件打开对话框，使用户可以浏览并选择一个文件。如何将文件中的文本输出到Xcode中的故事板中的文本视图框中，而不是在输出框中显示？

-(IBAction)openButton:(id)sender {
    // Create the File Open Dialog class.
    NSOpenPanel* openDlg = [NSOpenPanel openPanel];

    // Enable the selection of files in the dialog.
    [openDlg setCanChooseFiles:YES];

    // Multiple files not allowed
    [openDlg setAllowsMultipleSelection:NO];

    // Can't select a directory
    [openDlg setCanChooseDirectories:YES];

    // Display the dialog. If the OK button was pressed,
    // process the files.
    if ( [openDlg runModal] == NSModalResponseOK )
    {
        // Once a file has been opened and assigned a file handle, the contents of that file may be read from the current offset position. The readDataOfLength method reads a specified number of bytes of data from the file starting at the current offset. For example, the following code reads 5 bytes of data from offset 10 in a file. The data read is returned encapsulated in an NSData object.


        NSFileHandle *file;
        NSData *databuffer;

        NSURL *selection = openDlg.URLs[0];
        NSString *path = [[selection path]stringByResolvingSymlinksInPath];

        file = [NSFileHandle fileHandleForReadingAtPath:(@"%@", path)];

        if (file == nil)
            NSLog(@"Failed to open file");

        databuffer = [file readDataToEndOfFile];

        [file closeFile];
        NSString* newStr = [NSString stringWithUTF8String:[databuffer bytes]];

        NSLog(@"%@", newStr);
    }
}

这里是代码的IBOutlet部分

@property (noatomic, readwrite, weak) IBOutlet NSTextField *sourceLabel;
-(IBAction) openButton:(id)sender;

我不知道还有什么办法可以将插座连接到textview以显示文件中的文字

如何在Xcode的文本视图中显示文本文件

0 个答案: