我有一个UISearchDisplayController,它在tableview中显示结果.当我尝试滚动tableview时,contentsize正好是_keyboardHeight比它应该更高.这导致错误的底部偏移.有> tableview中有50个项目,因此下面不应该有空格
解决方法
我通过添加NSNotificationCenter侦听器解决了这个问题
- (void)searchDisplayController:(UISearchDisplayController *)controller willShowSearchResultsTableView:(UITableView *)tableView {
//this is to handle strange tableview scroll offsets when scrolling the search results
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardDidHide:)
name:UIKeyboardDidHideNotification
object:nil];
}
别忘了删除监听器
- (void)searchDisplayController:(UISearchDisplayController *)controller willHideSearchResultsTableView:(UITableView *)tableView {
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIKeyboardDidHideNotification
object:nil];
}
- (void)keyboardDidHide:(NSNotification *)notification {
if (!self.searchDisplayController.active) {
return;
}
NSDictionary *info = [notification userInfo];
NSValue *avalue = [info objectForKey:UIKeyboardFrameEndUserInfoKey];
CGSize KeyboardSize = [avalue CGRectValue].size;
CGFloat _keyboardHeight;
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
if (UIDeviceOrientationIsLandscape(orientation)) {
_keyboardHeight = KeyboardSize.width;
}
else {
_keyboardHeight = KeyboardSize.height;
}
UITableView *tv = self.searchDisplayController.searchResultsTableView;
CGSize s = tv.contentSize;
s.height -= _keyboardHeight;
tv.contentSize = s;
}
