字 体Typography
中文字体：PingFang SC
英文字体：SF UI Text 、SF UI Display
其中SF UI Text适用与小于19pt的文字，SF UI Display适用于大于20pt的文字
| 元 素 | 字 重 | 字 号 | 行 距 | 字间距 |
| Title 1 | Light | 28pt | 34pt | 13pt |
| Title2 | Regular |
28pt | 28pt | 16pt |
| Title3 | Regular | 20pt | 24pt | 24pt |
| Body |
Regular |
17pt |
22pt |
-24pt |
| Callout |
Regular |
16pt |
21pt |
-20pt |
| Subhead |
Regular |
15pt |
20pt |
-16pt |
| Footnote |
Regular | 13pt | 18pt | -6pt |
| Caption1 | Regular | 12pt | 16pt | 0pt |
| Caption2 | Regular | 11pt | 13pt | 6pt |
| Headline |
Semi-Bold |
17pt |
22pt |
-24pt |
| 元 素 | 字 重 | 字 号 | 行 距 | 字间距 |
| Title 1 | Light | 28pt | 34pt | 13pt |
| Title2 | Regular |
28pt | 28pt | 16pt |
| Title3 | Regular | 20pt | 24pt | 24pt |
| Body |
Regular |
17pt |
22pt |
-24pt |
| Callout |
Regular |
16pt |
21pt |
-20pt |
| Subhead |
Regular |
15pt |
20pt |
-16pt |
| Footnote |
Regular | 13pt | 18pt | -6pt |
| Caption1 | Regular | 12pt | 16pt | 0pt |
| Caption2 | Regular | 11pt | 13pt | 6pt |
| Headline |
Semi-Bold |
17pt |
22pt |
-24pt |
点和像素 Pt and Px
图标 Icon
应用图标 App Icon
分辨率和显示规格
配色
UI组件布局
状态栏 Status Bar（单位：PT）
导航栏 Navigation Bar
搜索栏 Search Bar
标签栏 Tab Bar
表格视图 Table View
Modals
行为区 Actions
提示框 Alerts
Segment Controls
滑动条 Sliders
切换按钮 Switch
计步器 Stepper
