iOS中UIAlertView警告框组件的使用教程

      {

            if( [view isKindOfClass:[UILabel class]] )

            {

                  UILabel* label = (UILabel*) view;

                  label.textAlignment=UITextAlignmentLeft;

            }

      }

}

 这段代码很简单， 就是在消息框即将弹出时，遍历所有消息框对象，将其文本对齐属性修改为 UITextAlignmentLeft即可。

 

添加其他部件也如出一辙， 如下代码添加两个UITextField:

复制代码
-(void) willPresentAlertView:(UIAlertView *)alertView

 

{

      CGRect frame = alertView.frame;

      frame.origin.y -= 120;

      frame.size.height += 80;

      alertView.frame = frame;

      for( UIView * viewin alertView.subviews )

      {

            if( ![viewisKindOfClass:[UILabelclass]] )

            {

                  CGRect btnFrame = view.frame;

                  btnFrame.origin.y += 70;