where is Apple documentation for TableViewCell View Modes (that appear in Interface Builder)?

where is Apple documentation for TableViewCell View Modes (that 开发者_开发百科appear in Interface Builder)?

I can't seem to find them - the modes include options such as:

• scale to fit
• aspect fit
• aspect fill
• redraw
• centre . . .

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UIView's contentMode is what you're after. UITableViewCell just inherits this property from UIView.

UIView - contentMode