将3个UItextfields中的数据分配到3个不同的字符串中

Question

我试图从3个不同的Uitextfields中获取3个不同的值，然后将它们保存为1个字符串，通过按钮操作将其发送到其他API服务器。我被困在如何从3个UItextfields获取所有3个文本输入。任何想法？我的文本字段是帐户，用户名和密码。

UITextField *account = [[UITextField alloc] initWithFrame:CGRectMake(90, 50, 140, 30)];
account.borderStyle = UITextBorderStyleRoundedRect;
account.font = [UIFont systemFontOfSize:14];
account.placeholder = @"Account";
account.autocorrectionType = UITextAutocorrectionTypeNo;
account.keyboardType = UIKeyboardTypeDefault;
account.returnKeyType = UIReturnKeyDone;
account.clearButtonMode = UITextFieldViewModeWhileEditing;
account.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
account.delegate = self;
[self.view addSubview:account];
[account release];


UITextField *username = [[UITextField alloc] initWithFrame:CGRectMake(90, 80, 140, 30)];
username.borderStyle = UITextBorderStyleRoundedRect;
username.font = [UIFont systemFontOfSize:14];
username.placeholder = @"User ID";
username.autocorrectionType = UITextAutocorrectionTypeNo;
username.keyboardType = UIKeyboardTypeDefault;
username.returnKeyType = UIReturnKeyDone;
username.clearButtonMode = UITextFieldViewModeWhileEditing;
username.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
username.delegate = self;
[self.view addSubview:username];
[username release];

UITextField *password = [[UITextField alloc] initWithFrame:CGRectMake(90, 110, 140, 30)];
password.borderStyle = UITextBorderStyleRoundedRect;
password.font = [UIFont systemFontOfSize:14];
password.placeholder = @"Password";
password.autocorrectionType = UITextAutocorrectionTypeNo;
password.keyboardType = UIKeyboardTypeDefault;
password.secureTextEntry = YES;
password.returnKeyType = UIReturnKeyDone;
password.clearButtonMode = UITextFieldViewModeWhileEditing;
password.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
password.delegate = self;
[self.view addSubview:password];
[password release];

使用时无法找到所有3个数据：

 -(void) textFieldDidEndEditing:(UITextField *)textField

功能

提前致谢！

Answer 1

设置文本字段标记

    userNameTextField.tag = 1
    accountTextField.tag = 2
    passwordTextField.tag = 3

将值保存在shouldChangeCharactersInRange

中

   - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{

        switch (textField.tag) {
            case 1:
                //userNameTextField
                NSString *userNameTextField = [NSString stringWithFormat:@"%@%@",textField.text,string];
                //save
                break;
            case 2:
                //accountTextField
                NSString *accountTextField = [NSString stringWithFormat:@"%@%@",textField.text,string];
                //save
                break;  
            case 3:
                //passwordTextField
                NSString *passwordTextField = [NSString stringWithFormat:@"%@%@",textField.text,string];
                //save
                break;  
            default:
                break;
        }

    }

Answer 2

你应该将UITextFields保存为ivars，以及关联NSStrings（userNameString，passwordString，accountString）。然后在下面的方法中，您应该检查哪个textField调用了您的委托，并将textField的文本分配给正确的字符串。你也可以使用textfield标签属性来区分它们，然后你不需要将它们保存为ivars ..

   -(void) textFieldDidEndEditing:(UITextField *)textField{
    if (textField==userName)
       userNameString = textField.text;
    if (textField== account)
       accountString = textField.text
    if (textField== password)
       password String = textField.text;
    }

Answer 3

1. 为每个文本字段指定tag，例如1，2和3
{li} in textFieldDidEndEditing:按标记区分三个文本字段：

if (textField.tag == 1) {
   // assign the text to the right variable
}
... etc.

如果您遵循此模式，则可以避免使用许多属性使您的类混乱。

为了使代码更具可读性，您可以使用以下模式：

#define userNameTextField 1
#define accountTextField 2
#define passwordTextField 3

或

typedef enum { 
   userNameTextField = 1,
   accountTextField,
   passwordTextField
} TextFields;