• 为什么要单独写这个东西呢，其实本人是比较懒的一个人，不太喜欢写一些总结类的东西，而且自己的性格又是哪种，要写就要写的完整，写得满意的那种，所以一些学习过程中的碎片化的东西，就很难提起兴趣去记录。
• 但是还是开了这个头，也是源于之前一直未完成的一个事情吧。最开始学习OC时，就想着要把所以UIKit,UIFoundation类都做个总结，那时用纸质笔记本做的，大概写了二分之一吧，很多不常用，用不到的类就没有写，而且写了的也不是很全，主要是技术有限啊。
• 现在学习和总结SwiftUI，再提这个，也没有抱着全部保质保量完成的希望，毕竟这个SwiftUI，还不是很成熟，现在也不能完全普及，慢慢完善吧！
• 计划呢是，实践代码加上属性和方法的说明和介绍，对比UIKit，也作为以后自己查阅和复习的一个记录！

主要介绍下面几个方面的东西

View 协议

protocol View
A type that represents a SwiftUI view.
Creating and Combining Views
This tutorial guides you through building Landmarks — an iOS app for discovering and sharing the places you love. You’ll start by building the view that shows a landmark’s details.
Working with UI Controls
In the Landmarks app, users can create a profile to express their personality. To give users the ability to change their profile, you’ll add an edit mode and design the preferences screen.

Text 内容视图

struct Text
A view that displays one or more lines of read-only text.
struct TextField
A control that displays an editable text interface.
struct SecureField
A control into which the user securely enters private text.
struct Font
An environment-dependent font.

Images 图片视图

struct Image
A view that displays an environment-dependent image.

Buttons 按钮

struct Button
A control that performs an action when triggered.
struct NavigationLink
A button that triggers a navigation presentation when pressed.
struct MenuButton
A button that displays a menu containing a list of choices when pressed.
struct EditButton
A button that toggles the edit mode for the current edit scope.
struct PasteButton
A system button that triggers reading data from the pasteboard.

Value Selectors 选择器

struct Toggle
A control that toggles between on and off states.
struct Picker
A control for selecting from a set of mutually exclusive values.
struct DatePicker
A control for selecting an absolute date.
struct Slider
A control for selecting a value from a bounded linear range of values.
struct Stepper
A control used to perform semantic increment and decrement actions.