Question

我创建了两个浮点变量：

var yourWeight = (yourWeightTextField.text as NSString).floatValue
var calorieNumber = (calorieNumberTextField.text as NSString).floatValue

我收到了以下错误：

// 'ViewController' does not have a member named 'yourWeightTextField'
// 'ViewController' does not have a member named 'yourWeightTextField'

我已经设置了我的IBOutlets：

class ViewController: UIViewController, UITextFieldDelegate, UIPickerViewDelegate, UIPickerViewDataSource {

@IBOutlet weak var calculatorButton: UIButton!
@IBOutlet weak var inspirationLabel: UILabel!
@IBOutlet weak var beginningLabel: UILabel!
@IBOutlet weak var calculatorContainer: UIView!
@IBOutlet weak var answer1Label: UILabel!
@IBOutlet weak var doneButton: UIButton!
@IBOutlet weak var yourWeightTextField: UITextField!
@IBOutlet weak var exerciseListPickerView: UIPickerView!
@IBOutlet weak var calorieNumberTextField: UITextField!
@IBOutlet weak var menuExampleButton: UIButton!
@IBOutlet weak var aboutButton: UIButton!
@IBOutlet weak var calculateButton: UIButton!

这是我的ViewDidLoad方法：

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib
    yourWeightTextField.delegate = self
    calorieNumberTextField.delegate = self
    exerciseListPickerView.delegate = self
    exerciseListPickerView.dataSource = self
    calculateButton.enabled = false
    // Calling the textfield valueChanged Methods
    yourWeightTextField.addTarget(self, action:"yourWeightEditingChanged:", forControlEvents:.EditingChanged);
    calorieNumberTextField.addTarget(self, action:"calorieNumberEditingChanged:", forControlEvents:.EditingChanged);
}

以下是代码的其余部分：

var yourWeight = (yourWeightTextField.text as NSString).floatValue
var calorieNumber = (calorieNumberTextField.text as NSString).floatValue
var exerciseCurrentValue:Float = 0.009
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
    switch (row) {
    case (0):
        exerciseCurrentValue = 0.009
    case (1):
        exerciseCurrentValue = 0.019
    case (2):
        exerciseCurrentValue = 0.023
    case (3):
        exerciseCurrentValue = 0.029
    case (4):
        exerciseCurrentValue = 0.045
    case (5):
        exerciseCurrentValue = 0.033
    case (6):
        exerciseCurrentValue = 0.038
    case (7):
        exerciseCurrentValue = 0.038
    case (8):
        exerciseCurrentValue = 0.039
    case (9):
        exerciseCurrentValue = 0.053
    case (10):
        exerciseCurrentValue = 0.061
    case (11):
        exerciseCurrentValue = 0.063
    case (12):
        exerciseCurrentValue = 0.063
    case (13):
        exerciseCurrentValue = 0.064
    case (14):
        exerciseCurrentValue = 0.076
    case (15):
        exerciseCurrentValue = 0.083
    default:
        exerciseCurrentValue = 0.009
    }
}

@IBAction func calculateButtonTapped(sender: AnyObject) {
    answer1Label.text = "It will take you \((exerciseCurrentValue) / ((yourWeight) * (calorieNumber))) minutes to burn off those calories by performing that exercise."
}

我还有另一个错误

@IBAction func calculateButtonTapped(sender: AnyObject) {
    answer1Label.text = "It will take you \((exerciseCurrentValue) / ((yourWeight) * (calorieNumber))) minutes to burn off those calories by performing that exercise."

，但我认为这将得到修复：

// 'ViewController' does not have a member named 'yourWeight'

请提供尽可能多的代码，因为我是编程新手。谢谢！

Answer 1

您无法使用实例值指定属性。

您需要像这样定义属性。

var yourWeight:Float = 0 // Or whatever default value you want
var calorieNumber:Float = 0 // Or whatever default value you want

然后在viewDidLoad中，无论你需要获取值，还是执行：

self.yourWeight = (self.yourWeightTextField.text as NSString).floatValue
self.calorieNumber = (self.calorieNumberTextField.text as NSString).floatValue

“'ViewController.Type'没有名为...的成员。”

1 个答案: