在iOS 5.0中使用Textfield显示AlertView时键盘无法打开

Question

I have created AlertView with TextField using this code:

UIAlertView * alert = [[UIAlertView alloc] initWithTitle:nil message:@"The person you selected does not have an email address on file. Please enter their email address below." delegate:self cancelButtonTitle:nil otherButtonTitles:@"Cancel",@"Submit",nil];
alert.tag = 1;
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
UITextField * alertTextField = [alert textFieldAtIndex:0];
alertTextField.keyboardType = UIKeyboardTypeEmailAddress;
alertTextField.placeholder = @"Enter Email address";
[alert show];

It display fine and open keyboard in ios 6 or latter but not in ios 5.

Here is my device screenshot which run on ios 5.1

Answer 1

I have tried your code and its does not show keyboard in iOS 5 as you said but i have just added resignFirstResponder in your textField after alert show and its worked. Here is the code,

UIAlertView * alert = [[UIAlertView alloc] initWithTitle:nil message:@"The person you selected does not have an email address on file. Please enter their email address below." delegate:self cancelButtonTitle:nil otherButtonTitles:@"Cancel",@"Submit",nil];
alert.tag = 1;
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
UITextField * alertTextField = [alert textFieldAtIndex:0];
// assert(alertTextField);
alertTextField.keyboardType = UIKeyboardTypeEmailAddress;
alertTextField.placeholder = @"Enter Email address";
[alert show];
[alertTextField resignFirstResponder];

And if you don't want to resignFirstResponder in iOS 6 and later than put this code at the end of your code instead of resignFirstResponder code than textField only resignFirstResponder for iOS version less than 6.0

float currentVersion = 6.0;     
if ([[[UIDevice currentDevice] systemVersion] floatValue] < currentVersion)
  {
     [alertTextField resignFirstResponder];
  }

Answer 2

Along with

    UITextField * alertTextField = [alert textFieldAtIndex:0];
alertTextField.keyboardType = UIKeyboardTypeEmailAddress;

you also write

alertTextField.delegate = self;

And in your header file (ie .h), pass textfield delegate like < UITextFieldDelegate >

Answer 3

try with different keyboardTypes like UIKeyboardTypeDefault , UIKeyboardTypePhonePad , etc.

Also try [alertTextField setUserInteractionEnabled:YES];

alertTextField.delegate = self;

then in the delegate method,

-(void)textFieldDidBeginEditing:(UITextField *)textField {     
    NSLog(@"textFieldDidBeginEditing method was called");
    if (!self.window.isKeyWindow) {
       [self.window makeKeyAndVisible];
    }
}

not pretty sure, but hope this works for you..

Answer 4

try this it is run on ios 5

CGRect textFieldFrame = CGRectMake(15.0f, 105.0f, 255.0f, 31.0f);

UITextField *txtYourTextField = [[UITextField alloc] initWithFrame:textFieldFrame];

txtYourTextField.placeholder = @"Your String";
txtYourTextField.backgroundColor = [UIColor whiteColor];
txtYourTextField.textColor = [UIColor blackColor];
txtYourTextField.font = [UIFont systemFontOfSize:14.0f];
txtYourTextField.borderStyle = UITextBorderStyleRoundedRect;
txtYourTextField.clearButtonMode = UITextFieldViewModeWhileEditing;
txtYourTextField.returnKeyType = UIReturnKeyDefault;
txtYourTextField.keyboardType = UIKeyboardTypeEmailAddress;
txtYourTextField.delegate=self;

txtYourTextField.contentVerticalAlignment =    UIControlContentVerticalAlignmentCenter;
txtYourTextField.tag = 1;
txtYourTextField.autocapitalizationType = UITextAutocapitalizationTypeNone;

UIAlertView *alert=[[UIAlertView alloc] initWithTitle:nil message:@"The person you selected does not have an email address on file. Please enter their email address below.\n\n\n" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Send",nil];
alert.tag=1;

[alert addSubview:txtYourTextField];
[alert show];

Hope this helps you!!!