标签：
Use Case: 在UITableView的delegate方法"tableView:didSelectRowAtIndexPath:"中调用
"[UIViewController presentViewController]"发现被显示的ViewController要有很长的延迟
才会显示出来。
修改后:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { NSInteger rowInSection = indexPath.row; switch (rowInSection) { case 2: // age { dispatch_async(dispatch_get_main_queue(), ^{ NSDate * nowDate = [NSDate date]; QZDatePickerViewController * datePickerViewController = [[QZDatePickerViewController alloc] initWithDate:nowDate]; datePickerViewController.delegate = self; [self presentViewController:datePickerViewController animated:NO completion:nil]; }); } break; }
1. presentViewController:animated:YES view will not appear until user taps again
http://stackoverflow.com/questions/21075540/presentviewcontrolleranimatedyes-view-will-not-appear-until-user-taps-again
iOS.Performance-trick-presentViewController-is-so-slow-in-didSelectRowAtIndexPath
标签：
原文地址：http://www.cnblogs.com/cwgk/p/4905032.html
