uibutton

问题 I have a button and title of the button is an integer. correctAnswer = randomNumber1 + randomNumber2 button1.setTitle("\(correctAnswer)", forState: UIControlState.Normal) I am trying to check the title of the button so convert it to an integer and use it in an if statement, but couldn't make it work. button1.titleLabel?.text?.toInt() if button1.titleLabel == correctAnswer { //most probably I am making a mistake here. scoring() } else { println(button1.titleLabel?.text!) I am new to swift , I

问题 I have created a database using SQLite which store student details including Student Name (String) Student Password (String) Student ID (String) Student Attendance(Boolean) In my solution, there are 3 view controller as describe below: ViewController1 : Table View, Display List of Students. ViewController2 : Normal View Controller with 3 text field and 1 switch button to get all 4 user detail. ViewController3 : A button that enable user to tap, and turn the attendance (boolean) to on. I would

问题 I have created a database using SQLite which store student details including Student Name (String) Student Password (String) Student ID (String) Student Attendance(Boolean) In my solution, there are 3 view controller as describe below: ViewController1 : Table View, Display List of Students. ViewController2 : Normal View Controller with 3 text field and 1 switch button to get all 4 user detail. ViewController3 : A button that enable user to tap, and turn the attendance (boolean) to on. I would

问题 I have created a database using SQLite which store student details including Student Name (String) Student Password (String) Student ID (String) Student Attendance(Boolean) In my solution, there are 3 view controller as describe below: ViewController1 : Table View, Display List of Students. ViewController2 : Normal View Controller with 3 text field and 1 switch button to get all 4 user detail. ViewController3 : A button that enable user to tap, and turn the attendance (boolean) to on. I would

问题 I have created a database using SQLite which store student details including Student Name (String) Student Password (String) Student ID (String) Student Attendance(Boolean) In my solution, there are 3 view controller as describe below: ViewController1 : Table View, Display List of Students. ViewController2 : Normal View Controller with 3 text field and 1 switch button to get all 4 user detail. ViewController3 : A button that enable user to tap, and turn the attendance (boolean) to on. I would

问题 I have created a database using SQLite which store student details including Student Name (String) Student Password (String) Student ID (String) Student Attendance(Boolean) In my solution, there are 3 view controller as describe below: ViewController1 : Table View, Display List of Students. ViewController2 : Normal View Controller with 3 text field and 1 switch button to get all 4 user detail. ViewController3 : A button that enable user to tap, and turn the attendance (boolean) to on. I would

问题 I have several buttons defined in a loop in viewDidLoad. They are inside a content view, which is in a scroll view. for var i:Int = 0; i < colleges.count; i++ { let collegeButton = UIButton.buttonWithType(UIButtonType.System) as UIButton collegeButton.frame = CGRectMake(0, 0, self.contentView.frame.size.width, 30) collegeButton.center = CGPoint(x: self.contentView.center.x, y: 30 * CGFloat(i) + 30) collegeButton.setTitle(sortedColleges[i], forState: UIControlState.Normal) collegeButton

问题 I'm a newbie in Unity Using Unity Inspector i have setup a button that makes a callback to a function (OnClick), it works fine but only once, to fire the action again i need to release and click the button again How can i make that the function keeps running over and over as long as the button is pressed? (like a machine gun) public void MoveLeft ( ) { transform.RotateAround(Camera.main.transform.position, Vector3.up, -rotation / 4 * Time.deltaTime); infopanel.RotateAround(Camera.main

问题 In trying to avoid retain cycles, would using [weak self] in in a UITableViewCell button action be necessary? Example: in ViewController's cellForRow cell.buttonAction = { (cell) [weak self] in self.someFunction() } in TableViewCell class var buttonAction: ((UITableViewCell) -> Void)? @IBAction func buttonPressed(_ sender: Any) { buttonAction?(self) } 回答1: The key line to think about is: var buttonAction: ((UITableViewCell) -> Void)? You are offering to store a function long-term in an

问题 Code: class ViewController: UIViewController{ var button = CustomButton() override func viewDidLoad(){ super.viewDidLoad() button.translatesAutoresizingMaskIntoConstraints = false view.addSubview(button) //add constraints and etc. } } class CustomButton: UIButton{ override func layoutSubviews() { super.layoutSubviews() self.layer.cornerRadius = self.layer.frame.width * 0.5 self.setTitle("abc", forState: .Normal) } } Question 1: how come I have to call super.layoutSubviews() for the setTitle()