如何移除全部subView和判断子视图…

NSArray *views = [self subviews];

for(UIVIew* view in views)

{

    [view
removefromsuperview];

}

判断子视图是否加了

for(UIView *view = self.view.subViews){

if(View isKindOfCless:[OneViewObject class]){

BOOL needAddToViewFlag = YES;

for(UIView *view = self.view.subViews){

if(View isKindOfCless:[OneViewObject class]){

needAddToViewFlag = NO;

}

}

if (needAddToViewFlag) {

[self.view addSubview:someView];

}