Common Properties:
@property (nonatomic,readonly) UIView *superview;
Get your own parent control object
@property (nonatomic,readonly,copy) Nsarray *subviews;
Get all of your child control objects
@property (nonatomic) nsinteger tag;
The ID (identity) of the control, and the parent control can find the corresponding child control by tag
@property (nonatomic) Cgaffinetransform transform;
The deformation properties of the control (you can set the rotation angle, scale, pan, and other properties)
@property (nonatomic) cgrect frame;
The position and dimensions of the control's rectangle in the parent control (the origin of the coordinates in the upper-left corner of the parent control), you can define the position of the control (origin) and the size (size)
@property (nonatomic) cgrect bounds;
The position and dimensions of the rectangle where the control is located (the origin of the coordinates in its upper-left corner, so bounds X, Y is typically 0), you can define the size of the control (size)
@property (nonatomic) Cgpoint Center;
Position of the control's midpoint (in the upper-left corner of the parent control as the origin of the coordinates), you can define the position of the Control (center)
The following are frequently used properties and methods:
Common methods:
-(void) Addsubview: (UIView *) view;
Add a child control view
-(void) Removefromsuperview;
Remove from parent control
-(UIView *) Viewwithtag: (nsinteger) tag;
Find the corresponding control based on a tag ID (usually a child control)
Common properties and methods of UIView