iOS超级怪异的问题，添加了子视图，而无需添加我

loadView

// Add the views to the Scroll View
[scrollView addSubview:label];
[scrollView addSubview:careerDescriptionWebView];

self.view = scrollView;

viewWillAppear:

// Change the height of the Scroll View dynamically to match the content
float hgt = 0; 

for (UIView *view in scrollView.subviews) {
    hgt += view.frame.size.height;
    NSLog(@\"View: %@, height: %f\", [[view class] description], view.frame.size.height);
}    

[scrollView setContentSize:CGSizeMake(scrollView.frame.size.width,hgt)];

2011-06-23 13:34:48.344 Acando[90355:207] View: UILabel, height: 21.000000
2011-06-23 13:34:48.345 Acando[90355:207] View: UIWebView, height: 1017.000000
2011-06-23 13:34:48.346 Acando[90355:207] View: UIImageView, height: 7.000000
2011-06-23 13:34:48.347 Acando[90355:207] View: UIImageView, height: 145.000000