开始
你认为学完 swift 之后就能够开发 App 啦？还早呢，UI 组件学一学吧 ????
UILabel
// 应用代码增加 UILabel 横向为 X，纵向为 Y，坐标原点在左上角
let label = UILabel(frame: CGRect(x: 20, y: 40, width: 200, height: 30))
label.text = "Hello World"
// 增加到以后视图
self.view.addSubview(label)
let label2 = UILabel(frame: CGRect(x: 20, y: 60, width: 200, height: 30))
label2.text = "Geer"
// 设置字体为 20 号加粗的零碎字体
label2.font = UIFont.boldSystemFont(ofSize: 20)
// 设置字体色彩为红色
label2.textColor = UIColor.red
// 设置暗影色彩
label2.shadowColor = UIColor.green
// 设置暗影偏移
label2.shadowOffset = CGSize(width: 2, height: 2)
// 设置字体对其
label2.textAlignment = NSTextAlignment.center
self.view.addSubview(label2)
// 多行文本
let text = """除了自定义连贯表的表名，你还能够通过传递额定的参数到 belongsToMany 办法来定义该表中字段的键名。第三个参数是定义此关联的模型在连贯表里的外键名，第四个参数是另一个模型在连贯表里的外键名："""
let label3 = UILabel(frame: CGRect(x: 20, y: 80, width: 200, height: 150))
label3.text = text
// 设置显示行数
label3.numberOfLines = 7
self.view.addSubview(label3)UIButton
// 创立 button 实例，指定 button 的类型
let button = UIButton(type: .system)
// 设置地位与尺寸
button.frame = CGRect(x: 20, y: 40, width: 100, height: 30)
// 设置按钮背景色彩
button.backgroundColor = .purple
// 设置按钮题目
button.setTitle("我是按钮", for: UIControl.State())
// 设置题目背景色彩
button.setTitleColor(.white, for: UIControl.State())
// 为按钮增加事件
// 第一个传入触发事件时事件办法的执行者，比方以后则是 self
// 第二个参数传入一个 #selector 选择器实例，这个参数决定要执行的办法
// 第三个参数设置触发的条件，列入按钮被按下，按钮被按下并抬起
button.addTarget(self, action: #selector(touchBegin), for: UIControl.Event.touchUpInside)
self.view.addSubview(button)@objc func touchBegin(){print("click button")
}UIImageView
// 创立图片实例
let image = UIImage(named: "img1")
// 创立图片 View
let imageView = UIImageView(image: image)
// 设置 view 的地位
imageView.frame = CGRect(x: 40, y: 50, width: 200, height: 200)
self.view.addSubview(imageView)
// 动画
var imageArray = Array<UIImage>()
for index in 1...2 {if let fImage = UIImage(named: "f\(index)") {imageArray.append(fImage)
}
}
// 创立 View
let fImageView = UIImageView(frame: CGRect(x: 30, y: 250, width: 200, height: 100))
// 设置动画数组
fImageView.animationImages = imageArray
// 设置播放时长
fImageView.animationDuration = 3
// 设置动画播放次数
fImageView.animationRepeatCount = 0
self.view.addSubview(fImageView)
// 开始播放
fImageView.startAnimating()UITextField
// 创立实例 设置尺寸
let textField = UITextField(frame: CGRect(x: 20, y: 30, width: 100, height: 30))
// 设置边框输出格调
textField.borderStyle = .line
// 设置文字色彩
textField.textColor = .red
// 设置对齐形式
textField.textAlignment = .center
// 设置提醒文字
textField.placeholder = "请输出姓名"
// 设置代理为自身
textField.delegate = self
self.view.addSubview(textField)
let textField2 = UITextField(frame: CGRect(x: 20, y: 90, width: 100, height: 30))
// 设置边框输出格调
textField2.borderStyle = .line
// 设置文字色彩
textField2.textColor = .red
// 设置对齐形式
textField2.textAlignment = .center
// 设置提醒文字
textField2.placeholder = "请输出姓名"
// 左视图
let imageView1 = UIImageView(image: UIImage(named: "img1"))
imageView1.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
// 右视图
let imageView2 = UIImageView(image: UIImage(named: "f1"))
imageView2.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
// 设置左右视图
textField2.leftView = imageView1
textField2.rightView = imageView2
// 设置视图模式
textField2.leftViewMode = .always
textField2.rightViewMode = .always
self.view.addSubview(textField2)代理办法
// 在输入框行将进入编辑状态时调用
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {print("行将进入编辑状态时调用")
return true
}
// 曾经开始编辑时调用
func textFieldDidBeginEditing(_ textField: UITextField) {print("曾经开始编辑时调用")
}
// 按 return 时调用
func textFieldShouldReturn(_ textField: UITextField) -> Bool {textField.resignFirstResponder()
return true
}UISwitch
let swi = UISwitch()
swi.frame = CGRect(x: 20, y: 20, width: 100, height: 20)
// 设置视图中心点的坐标
swi.center = CGPoint(x: 100, y: 100)
// 设置开启状态的色彩
swi.onTintColor = .green
// 设置一般状态的色彩
swi.tintColor = .red
// 设置滑动的色彩
swi.thumbTintColor = .purple
// 设置开关的初始状态
swi.isOn = true
swi.addTarget(self, action: #selector(switchChange), for: UIControl.Event.valueChanged)
self.view.addSubview(swi)@objc func switchChange(swi: UISwitch){print(swi.isOn)
}UIPageController
// 创立
let pageControl = UIPageControl(frame: CGRect(x: 20, y: 100, width: 280, height: 30))
// 设置页数
pageControl.numberOfPages = 10
// 设置背景色彩
pageControl.backgroundColor = .red
// 设置页码点背景色彩
pageControl.pageIndicatorTintColor = .green
// 设置选中的页码点色彩
pageControl.currentPageIndicatorTintColor = .blue
// 设置以后选中的页数
pageControl.currentPage = 3
pageControl.addTarget(self, action: #selector(uiPageChange), for: UIControl.Event.valueChanged)
self.view.addSubview(pageControl) @objc func uiPageChange(pageControl: UIPageControl){print("以后 \(pageControl.currentPage)")
}UISegmentedControl
let items = ["按钮 1","按钮 2","按钮三"]
let segmentedControl = UISegmentedControl(items: items)
// 设置地位与尺寸
segmentedControl.frame = CGRect(x: 100, y: 100, width: 200, height: 30)
// 设置控件格调与色彩
segmentedControl.tintColor = .blue
segmentedControl.addTarget(self, action: #selector(segmentedControlChange), for: UIControl.Event.valueChanged)
self.view.addSubview(segmentedControl)@objc func segmentedControlChange(seg: UISegmentedControl){print("抉择了 \(seg.selectedSegmentIndex)")
// 插入新的按钮
seg.insertSegment(withTitle: "按钮 5", at: 0, animated: true)
}UISlider
let slider = UISlider(frame: CGRect(x: 20, y: 100, width: 280, height: 30))
// 设置最小值
slider.minimumValue = 0
slider.maximumValue = 10
// 初始滑块的值
slider.value = 5
// 设置滑块左侧进度条的色彩
slider.minimumTrackTintColor = .red
// 设置滑块右侧的色彩
slider.maximumTrackTintColor = .green
// 设置滑块的色彩
slider.thumbTintColor = .blue
// 设置进行滑动才触发事件
slider.isContinuous = false
slider.addTarget(self, action: #selector(uISliderChange), for: UIControl.Event.valueChanged)
self.view.addSubview(slider)@objc func uISliderChange(slider: UISlider){print(slider.value)
}UIActivityIndicatorView
let activity = UIActivityIndicatorView(style: UIActivityIndicatorView.Style.medium)
activity.center = self.view.center
activity.color = .blue
// 开始播放
activity.startAnimating()
self.view.addSubview(activity)UIProgressView
let progressView = UIProgressView(progressViewStyle: UIProgressView.Style.default)
// 设置地位和宽度
progressView.frame = CGRect(x: 20, y: 100, width: 280, height: 30)
// 设置以后进度
progressView.progress = 0.5
// 设置已走过的进度条进度
progressView.progressTintColor = .red
// 设置未走过的色彩
progressView.trackTintColor = .blue
self.view.addSubview(progressView)UIStepper
let steper = UIStepper(frame: CGRect(x: 100, y: 100, width: 0, height: 0))
// 设置背景色彩
steper.backgroundColor = UIColor.red
// 设置控件色彩
steper.tintColor = .blue
// 设置最小值
steper.minimumValue = 0
steper.maximumValue = 10
// 设置控件的步长
steper.stepValue = 1
self.view.addSubview(steper)UIPickerView
let pickerView = UIPickerView(frame: CGRect(x: 20, y: 100, width: 280, height: 200))
// 设置代理 须要增加 UIPickerViewDelegate
pickerView.delegate = self
// 设置数据源 须要增加 UIPickerViewDataSource
pickerView.dataSource = self
self.view.addSubview(pickerView)代理
// pickView 此办法须要选择器控件的分组数量
func numberOfComponents(in pickerView: UIPickerView) -> Int {return 2}
// 此办法须要返回每个分组的行数
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {return 10}
// 此办法返回每个分组中的每行数据的题目
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {return "第 \(component + 1) 组第 \(row) 行"
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {print("用户抉择了 \(component) 组 \(row) 行")
}UIDataPicker
let dataPicker = UIDatePicker(frame: CGRect(x: 20, y: 100, width: 280, height: 200))
// 设置工夫选择器的模式
dataPicker.datePickerMode = .dateAndTime
dataPicker.addTarget(self, action: #selector(uiDataPickerChange), for: UIControl.Event.valueChanged)
self.view.addSubview(dataPicker)@objc func uiDataPickerChange(dataPicker: UIDatePicker){print(dataPicker.date)
}UISearchBar
let searchBar = UISearchBar(frame: CGRect(x: 20, y: 100, width: 280, height: 30))
// 设置控件的格调
searchBar.searchBarStyle = .minimal
searchBar.placeholder = "请输出商品题目"
// 显示勾销按钮
searchBar.showsCancelButton = true
// 显示控件的书库按钮
searchBar.showsBookmarkButton = true
self.view.addSubview(searchBar)完结
今日先学这么多，今天再持续