在swift中对视图和按钮应用渐变颜色时出现的问题

import UIKit

// 创建渐变层
let gradientLayer = CAGradientLayer()
gradientLayer.frame = view.bounds

// 设置渐变颜色数组
gradientLayer.colors = [UIColor.red.cgColor, UIColor.blue.cgColor]

// 将渐变层添加到视图中
view.layer.addSublayer(gradientLayer)

import UIKit

// 创建渐变层
let gradientLayer = CAGradientLayer()
gradientLayer.frame = view.bounds

// 设置渐变颜色数组
gradientLayer.colors = [UIColor.red.cgColor, UIColor.blue.cgColor]

// 设置渐变的起始点和结束点
gradientLayer.startPoint = CGPoint(x: 0.0, y: 0.5)
gradientLayer.endPoint = CGPoint(x: 1.0, y: 0.5)

// 将渐变层添加到视图中
view.layer.addSublayer(gradientLayer)