ios 获取页面的所有uiimageview 和UIButton

- (void) layoutSubviews {
    //屏蔽系统的ImageView 和 UIButton
    for (UIView *v in [self subviews]) {
        if ([v class] == [UIImageView class]){
            [v setHidden:YES];
        }
        
        if ([v isKindOfClass:[UIButton class]] ||
            [v isKindOfClass:NSClassFromString(@"UIThreePartButton")]) {
            [v setHidden:YES];
        }
    }

//删除当前视图上所有view
    NSArray *subViews = [self subviews];
    if([subViews count] != 0) {
        [subViews makeObjectsPerformSelector:@selector(removeFromSuperview)];
    }