我目前正在从事#hackingwithswift 的项目 4。我遇到的问题是无法从表单 View 中更改选择器的样式。
这是我正在处理的代码的一小段。请假设代码的其余部分是正确的。无论我在 .pickerStyle() 中添加什么修饰符,我总是会收到错误:
Type 'WheelPickerStyle.Type' cannot conform to 'PickerStyle'; only struct/enum/class types can conform to protocols
NavigationView{
Form{
Section(header: Text("When do you want to wake up?") .font(.headline)) {
DatePicker("Please enter a time", selection: $wakeUp, displayedComponents: .hourAndMinute)
.datePickerStyle(WheelDatePickerStyle())
.labelsHidden()
}
Section(header: Text("Desired amount of sleep")
.font(.headline)) {
Stepper(value: $sleepAmount, in: 4...12, step: 0.25) {
Text("\(sleepAmount, specifier: "%g") hours")
}
}
Section(header: Text("Daily coffee intake")
.font(.headline)) {
Picker("Number of coffees had in a day", selection: $coffeeAmount) {
Text("1")
Text("2")
Text("3")
}
.pickerStyle(WheelPickerStyle)
}
谁能帮帮我吗?请解释我做错了什么,我是初学者!
提前致谢!
最佳答案
在你的代码中
Picker("Number of coffees had in a day", selection: $coffeeAmount) {
Text("1")
Text("2")
Text("3")
}
.pickerStyle(WheelPickerStyle)
}
您应该使用WheelPickerStyle()
而不是WheelPickerStyle
关于SwiftUI - 无法将修饰符添加到表单内的选取器 View ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/64620513/