iOS8 UIAlertController弹出框中添加视图（例如日期选择器等等）

UIDatePicker *datePicker = [[UIDatePicker alloc] init]; datePicker.datePickerMode = UIDatePickerModeDate;

UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"\n\n\n\n\n\n\n\n\n\n\n\n" message:nil 　　preferredStyle:UIAlertControllerStyleActionSheet];

[alert.view addSubview:datePicker];

UIAlertAction *ok = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

NSDateFormatter* dateFormat = [[NSDateFormatter alloc] init];

//实例化一个NSDateFormatter对象

[dateFormat setDateFormat:@"yyyy-MM-dd"];//设定时间格式

NSString *dateString = [dateFormat stringFromDate:datePicker.date];

//求出当天的时间字符串

NSLog(@"%@",dateString);

}];

UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

　 }];

[alert addAction:ok];

[alert addAction:cancel];

[self presentViewController:alert animated:YES completion:^{ }];