UIAlertView用法
//显示对话框
UIAlertView *alert = [[UIAlertView alloc] initWithTitle"@"标题" message:nil delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:@"确定",nil];
//输入框样式
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
//设置名称到文本框
UITextField *textField = [alert textFieldAtIndex:0];
textField.text = name;
[alert show];
//点击了AlertView上面的按钮时会调用
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSIneteger) buttonIndex{}
//重新向dataSrouce请求数据
//重新调用数据源的方法numberOfRowsInSection和cellForRowAtIndexPath
[tableview reloadData];