从数据库刷新/重新加载textview |按钮抽头功能

Question

我已宣布textview outlet：

@IBOutlet weak var messageView: UITextView!

我创建了界面操作，并放置逻辑：

@IBAction func refreshTextViewTapped(sender: UIButton) {

// logic

}

使用新内容重新加载/更新textview。

Answer 1

是不是setText函数会自动更新textview？如果文本已经更新，您需要重新加载函数吗？

- (void)viewDidLoad()
{
    setMyTextView();

    // create the button that calls your function to update the text view
    UIButton *myButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 44);
    [myButton addTarget:self action:@selector(setMyTextView) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:myButton];
}

- (void)setMyTextView()
{
    NSString *myText = // value that is returned from the database query;
    [self.myTextView setText:myText];
}