Common uses of UIView

Common uses of UIView

1.addSubview: (UIView *) Child

Add child controls (added late display on top)

2.NSArray *subviews

The child controls added by the Addsubview: method will exist in this array

3.removeFromSuperview

Remove the control itself from the parent control (the control itself is also removed from the parent control's subviews array)

4. (UIView *) Viewwithtag: (int) MyTag

Returns a child control with a tag value of MyTag

A [B = 2 \ C = 2 \ D = 3];

[A Viewwithtag:2];

for (UIView *child in A.superviews) {

if (Child.tag = = 2) return child;

}

Return nil;

If the tag value of more than one child control is the same, only the first matching child control is returned (the control itself is also included when searching for tag matching controls)

5.UIView *superview

Parent control

Common uses of UIView