Steps to customize the cell (the height of each cell is different, and the contents of each cell are different)

1. Create a new subclass that inherits from UITableViewCell  

2. Initialization of child controls in Initwithstyle: Method

1> all child controls that are likely to be displayed are added to the Contentview

2> set some properties of the child controls (one-time settings: font, text color, background

3.2 Models available

1> One is the data model (text data + picture data)

2> One is a frame model (data Model + height of frame + cell for all child controls)

4. Cell should provide a Frame model property

1> passing the frame model to the cell

2> cell sets the frame to the child control according to the frame model, sets the data to the child control according to the data model

3> cell determines which child controls are displayed and hidden based on the data model

5. The proxy method in TableView returns the height of the cell

Steps to customize the cell (the height of each cell is different, and the contents of each cell are different)