导入 MBProgressHUD 第三方
// 显示提示框
-(void)showMBAlertWithMessage:(NSString *)msg{
MBProgressHUD *hud = [[MBProgressHUD alloc]initWithView:self.view];
// 设置文本的提示样式 显示样式
hud.mode = MBProgressHUDModeText;
// 自动从父视图移除
hud.removeFromSuperViewOnHide = YES;
hud.labelText = msg;
[self.view addSubview:hud];
[hud show:YES];
[hud hide:YES afterDelay:2.0];
}
//再点击事件里添加
[self showMBAlertWithMessage:@"手机号不可为空"];```