IOS7 UIPickerView如何隐藏选择指示器

如何隐藏IOS7 UIPickerView的选择指示器

swift
// 创建UIPickerView对象
let pickerView = UIPickerView()
// 将背景颜色设置为透明
pickerView.backgroundColor = UIColor.clear

swift
import UIKit
class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    let fruits = ["Apple", "Banana", "Orange", "Mango", "Strawberry"]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建UIPickerView对象
        let pickerView = UIPickerView()
        
        // 将背景颜色设置为透明
        pickerView.backgroundColor = UIColor.clear
        
        // 设置数据源和委托
        pickerView.delegate = self
        pickerView.dataSource = self
        
        // 将UIPickerView添加到视图中
        view.addSubview(pickerView)
    }
    
    // UIPickerViewDataSource协议方法，返回选择器的列数
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    
    // UIPickerViewDataSource协议方法，返回每一列的行数
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return fruits.count
    }
    
    // UIPickerViewDelegate协议方法，返回每一行的标题
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return fruits[row]
    }
}