iphone - 如何检查文本字段中是否有文本并单击按钮

Question

我有我想要的应用程序，如果其中没有任何数据textfield并且尚未单击按钮，则它会显示警报视图。否则，它调用一个方法。我有BOOL isClicked并且我已经设置了YES单击按钮的时间，但是如何检查这个和textfield.

BOOL isClicked;
feedbackTextfield; 
if(isClicked && feedbackTexfield)

Answer 1

试试这个代码......

  if((!isCliked) && ([feedbackTexfield.text length] == 0))
    {
        //button may not clicked or feedbackTextfield not contains text block.

        //Display your alert stuff

         UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Button is not clicked" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
              [alertView show];  
    }
    else
    {
        //button may clicked or feedbackTextfield contains text block.
    }

这是解决你的问题...

Answer 2

if(yourTextField.text.length == 0 && isClicked == FALSE)
{
   // Here goes Alert
}
else
{
  // Write your stuff
}