Refresh/reload 来自数据库的文本视图 |按钮点击功能

Question

我已经声明了 textview 插座：

@IBOutlet weak var messageView: UITextView!

我已经创建了界面动作，并放置了逻辑：

@IBAction func refreshTextViewTapped(sender: UIButton) {

// logic

}

Reload/update 包含新内容的文本视图。

Answer 1

setText函数不会自动更新textview吗？如果文本已经更新，您需要重新加载功能做什么？

- (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];
}

Refresh/reload 来自数据库的文本视图 |按钮点击功能

Refresh/reload textview from database | Button Tapped Function

database

refresh

reload

textview

ios