Question

我们需要知道如何在国家安全局的窗口中为我的申请提供一个评论箱,这样,当我打开一幅名字时,案文一想,一点点点击子,然后把我的案文添加到下文中一个不可编辑的方框中。就像你方言评论箱一gues格一样,人们期望实际上不需要在发表评论时记录下来。请帮助!

Answer 1

You need two NSTextViews, or a NSTextView and an NSTextField for one-line only comments. The bottom NSTextView is marked as read-only. You also need an object responsible for keeping track of the text, which should be connected to both NSTextViews. It will have an IBAction which is attached to the button. When the button is pressed, it will take the content of the editable text view and append it to the read-only text view s textStorage. It will also append newlines so the next comment is separated. I am not sure if that will automatically redisplay the text view or if you need to call setNeedsDisplay manually. You may also want to set the content of the editable text view to the empty string in this method.

例IBAction:

- (IBAction)addComment:(id)sender {
    NSString *string = [editableTextView string]; //stringValue if using NSTextField
    string = [string stringByAppendingString:@"

"];
    [[commentTextView textStorage] appendAttributedString:[[[NSAttributedString alloc] initWithString:string] autorelease]];
    [commentTextView setNeedsDisplay:YES];
    [editableTextView setString:@""];
}

友情链接