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我目前正在参与#hackingwithswift 的项目 4。我遇到了无法从表单视图中更改选择器样式的问题。

这是我正在处理的代码的一小段。请假设其余代码是正确的。无论我输入什么修饰符.pickerStyle(),我总是得到错误:

类型“WheelPickerStyle.Type”不能符合“PickerStyle”;只有结构/枚举/类类型可以符合协议

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)
                    }

谁能帮我吗?请解释我做错了什么,我是初学者!

提前致谢!

4

1 回答 1

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在您的代码中

Picker("Number of coffees had in a day", selection: $coffeeAmount) {
                            Text("1")
                            Text("2")
                            Text("3")
                        }
                    .pickerStyle(WheelPickerStyle)
                    }

你应该使用WheelPickerStyle()而不是WheelPickerStyle

于 2020-10-31T11:22:42.803 回答