ios 中searchBar进入界面立即聚焦处理方式

开发中可能会碰到调用第一响应者[self.searchController.searchBar becomeFirstResponder]无效;

解决方法：

#pragma mark UISearchControllerDelegate

- (void)didPresentSearchController:(UISearchController *)searchController {

    [UIView animateWithDuration:0.1 animations:^{} completion:^(BOOL finished) {

        [self.searchController.searchBar becomeFirstResponder];

    }];

}

 

iOS 10.2之后可能直接掉用方法无效