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How to handle multiple text fields effectively in UITextField's shouldChangeCharactersIn


How to handle multiple text fields effectively in UITextField's shouldChangeCharactersIn

By : user2173528
Date : October 20 2020, 08:10 PM
will help you I've a number of textFields, I want to change text colour to white when user is typing them in text field. Following is my code with a lot of if conditions which doesn't seem to be efficient. Is there any way to do it without writing a lot of if conditions? , Just do
code :
textField.textColor = .white


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How to use UITextfield's text in multiple UITextfields?

How to use UITextfield's text in multiple UITextfields?


By : Mandy Sidana
Date : March 29 2020, 07:55 AM
This might help you There's no 'broadcast' idea that will allow you to set them all with one statement. You'll just have to have as many assignments as you have text fields. If you have a billion of them, you could write some Perl to output the code.
e.g.
code :
tex34.text = text33.text;
tex35.text = text33.text;
tex36.text = text33.text;
tex37.text = text33.text;
const NSString *text = tex33.text;
tex34.text = text;
tex35.text = text;
//etc
const NSString *text = tex33.text;

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

for (int i = 34; i < 1653; i++) {
   const NSString *key = [NSString stringWithFormat:@"tex%d.text", i];
   [self setValue:text forKey:key];
   if (i % 100 == 0) [pool drain];
}

[pool release];
How to set up a MySQL database effectively for large text and html fields

How to set up a MySQL database effectively for large text and html fields


By : Melkiy
Date : March 29 2020, 07:55 AM
this one helps. You left a lot of requirements unstated, so it's hard to be specific.
But here's what I would do if I were working in MySQL.
code :
 post_id    int      primary key   an id number
 field      int      not null      which of the 20 or so text fields this goes with
 user_id    int      not null fk   the user making the post
 active     tinyint                1 = active   2 = invisible to users (deleted)
 (other identifying data as needed)
 posttime   datetime not null      when the post was first created
 edittime   datetime not null      when the post was most recently changed 
                                    (if never changed, the same as posttime)
 title      varchar                text of the post's title
 post_id      int       part of primary key
 posttext_id  int       part of primary key 
 posttext     text      part or all of the post's text
 active       tinyint   1 = active   2 = invisible to users (deleted)
How do I effectively implement modules in an MVC framework, and handle routing to multiple Controllers in a single modul

How do I effectively implement modules in an MVC framework, and handle routing to multiple Controllers in a single modul


By : m.ms
Date : March 29 2020, 07:55 AM
wish helps you The issue seems to be caused by over-simplified routing mechanism. The impression i get is that you are using simple explode() to collect the parameters from URL. While this works just fin in basic examples, the setup will fail when you try to use a bit more advanced routing schemes.
Instead of splitting the string on /, you should match it against regexp patterns. Basically, you define a list of patterns to match against and first match is used to populate the Request instance.
how to handle shouldChangeCharactersIn for a TextField, if it is located in the Custom Cell in the TabelViewControler

how to handle shouldChangeCharactersIn for a TextField, if it is located in the Custom Cell in the TabelViewControler


By : Roa48
Date : March 29 2020, 07:55 AM
Hope that helps You need to set the delegate for your UITextField that you create. myViewCell will be implementing the delegate function of your UITextField.
code :
class myViewCell: UITableViewCell, UITextFieldDelegate {
        @IBOutlet weak var myEdit: UITextField!
        func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
            // don`t work ((
        }
    }


override func awakeFromNib() {
    super.awakeFromNib()
    myEdit.delegate = self
}
Cursor goes to end after setting text to UITextField inside shouldChangeCharactersIn

Cursor goes to end after setting text to UITextField inside shouldChangeCharactersIn


By : ankit
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I have text label which has phone number in it. I mask the phone number when user is typing so that in shouldChangeCharactersIn function;
code :
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

        guard CharacterSet(charactersIn: "0123456789").isSuperset(of: CharacterSet(charactersIn: string)) else {
            return false
        }
        if let text = textField.text {
            let newLength = text.count + string.count - range.length
            let newText = text + string

            let textFieldText: NSString = (textField.text ?? "") as NSString
            let txtAfterUpdate = textFieldText.replacingCharacters(in: range, with: string)
            if(newLength <= 15){

                var currentPosition = 0
                if let selectedRange = textField.selectedTextRange {
                    currentPosition = textField.offset(from: textField.beginningOfDocument, to: selectedRange.start)
                }

                if(string == ""){
                    if(currentPosition == 2){
                        if(textField.text!.count > 2){
                            currentPosition = 1
                        }else{
                            currentPosition = 0
                        }
                    }else if(currentPosition == 7){
                        currentPosition = 4
                    }else if(currentPosition == 11){
                        currentPosition = 9
                    }else if(currentPosition == 14){
                        currentPosition = 12
                    }else{
                        if(currentPosition != 1){
                            currentPosition = currentPosition - 1
                        }
                    }
                }else{
                    if(currentPosition == 0){
                        currentPosition = 2
                    }else if(currentPosition == 4){
                        currentPosition = 7
                    }else if(currentPosition == 9){
                        currentPosition = 11
                    }else if(currentPosition == 12){
                        currentPosition = 14
                    }else{
                        currentPosition = currentPosition + 1
                    }
                }

                textField.text = txtAfterUpdate.applyPatternOnNumbers()
                print("textField Length -> : \(textField.text?.count ?? 0)")

                    if let newPosition = textField.position(from: textField.beginningOfDocument, offset: currentPosition) {
                        textField.selectedTextRange = textField.textRange(from: newPosition, to: newPosition)
                    }

                return false
            }
            return newLength <= 15
        }
        return true
    }
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