查看当前view tree结构
下列代码加入到AppDelegate
- (void)dumpView:(UIView *)aView atIndent:(int)indent into:(NSMutableString *)outstring
{
for (int i = 0; i < indent; i++) [outstring appendString:@"--"];
[outstring appendFormat:@"[%2d] %@\n", indent, [[aView class] description]];
for (UIView *view in [aView subviews])
[self dumpView:view atIndent:indent + 1 into:outstring];
}
// Start the tree recursion at level 0 with the root view
- (NSString *) displayViews: (UIView *) aView
{
NSMutableString *outstring = [[NSMutableString alloc] init];
[self dumpView: self.window atIndent:0 into:outstring];
return outstring ;
}
// Show the tree
- (void)logViewTreeForMainWindow
{
// CFShow([self displayViews: self.window]);
NSLog(@"The view tree:\n%@", [self displayViews:self.window]);
}
然后在你想使用的地方使用
AppDelegate *a=(AppDelegate *)[[UIApplicationsharedApplication] delegate];
[a logViewTreeForMainWindow];
此时打印的就是 当前的view tree
如下：
[ 0] UIWindow --[ 1] UILayoutContainerView ----[ 2] UITransitionView ------[ 3] UIViewControllerWrapperView --------[ 4] UILayoutContainerView ----------[ 5] UINavigationTransitionView ------------[ 6] UIViewControllerWrapperView --------------[ 7] UITableView ----------------[ 8] UITableViewCell ------------------[ 9] UITableViewCellContentView --------------------[10] UILabel --------------------[10] UIImageView ------------------[ 9] UIButton --------------------[10] UIImageView ------------------[ 9] UIView ----------------[ 8] UITableViewCell ------------------[ 9] UITableViewCellContentView --------------------[10] UILabel --------------------[10] UIImageView ------------------[ 9] UIButton --------------------[10] UIImageView ------------------[ 9] UIView ----------------[ 8] UITableViewCell ------------------[ 9] UITableViewCellContentView --------------------[10] UILabel --------------------[10] UIImageView ------------------[ 9] UIButton --------------------[10] UIImageView ------------------[ 9] UIView ----------------[ 8] UITableViewCell ------------------[ 9] UITableViewCellContentView --------------------[10] UILabel --------------------[10] UIImageView ------------------[ 9] UIButton --------------------[10] UIImageView ------------------[ 9] UIView ----------------[ 8] UITableViewCell ------------------[ 9] UITableViewCellContentView --------------------[10] UILabel --------------------[10] UIImageView ------------------[ 9] UIButton --------------------[10] UIImageView ------------------[ 9] UIView ----------------[ 8] UITableViewCell ------------------[ 9] UITableViewCellContentView --------------------[10] UILabel --------------------[10] UIImageView ------------------[ 9] UIButton --------------------[10] UIImageView ------------------[ 9] UIView ----------------[ 8] _UITableViewSeparatorView ----------------[ 8] _UITableViewSeparatorView ----------------[ 8] _UITableViewSeparatorView ----------------[ 8] _UITableViewSeparatorView ----------------[ 8] _UITableViewSeparatorView ----------------[ 8] _UITableViewSeparatorView ----------------[ 8] _UITableViewSeparatorView ----------[ 5] UINavigationBar ------------[ 6] UIMoreListController ------------[ 6] UINavigationItemView ------------[ 6] UINavigationButton --------------[ 7] UIImageView --------------[ 7] UIButtonLabel ----[ 2] UITabBarCustomizeView ------[ 3] UINavigationBar --------[ 4] UINavigationBarBackground --------[ 4] UINavigationItemView --------[ 4] UINavigationButton ----------[ 5] UIImageView ----------[ 5] UIButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ----[ 2] UITabBar ------[ 3] _UITabBarBackgroundView ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel ------[ 3] UITabBarButton --------[ 4] UITabBarSelectionIndicatorView --------[ 4] UITabBarSwappableImageView --------[ 4] UITabBarButtonLabel