i want to write the text to UILabel which is inputed from iphone's keypad. when i tapped button as in screen shot. how i can do that ? i don't want to use Textfield.
-(IBAction) buttonTapped {
[self.yourlabel setText:[textField text]];
}
Add a UITextField (you can name it hiddenTextField) some where, and set it hidden in view, so it'll become invisible to everyone, in viewDidLoad method of that UIViewController write,
[hiddenTextField becomeFirstResponder]; //it will make UIKeyBoard show on screen
On your UIButton action write,
- (IBAction)myAction {
myLabel.text = hiddenTextField.text;
//Don't forget to set `hiddenTextField` delegate to self.
[hiddenTextField resignFirstResponder];
}
I have created a TableView that contains UIViews, which hold a few other elements. These UIViews are created dynamically, as the data is called from a server. Inside each UIView there is a UILabel and a UIButtton. Once the button is clicked, I would like to have the corresponding label updated with some value. I was able to modify the UIButton and the view itself but unable to modify the UILabel. Here is an example of the method that is called when a UIButton is called. Right now it will change the background color of the corresponding UIView, but the label element does not work as intended. How can accomplish modifying this label element which is a subelement of the UIView?
- (void) heartPlus:(id)sender {
UIButton *button = (UIButton*) sender;
NSInteger id_num = button.tag;
UIView * view = (UIView *)[self.view.superview viewWithTag:id_num];
UILabel * label = (UILabel *)[view viewWithTag:id_num];
label.backgroundColor = [UIColor blueColor];
}
Creating the UIView along with adding the corresponding elements.
UIView * msgView = [[[UIView alloc] initWithFrame:CGRectMake(0,offSet,320,120)] init];
[msgView setTag:someID];
// Add button
UIButton * buttonUpdate = [UIButton buttonWithType:UIButtonTypeRoundedRect];
buttonUpdate.tag = someID;
[buttonUpdate addTarget:self action:#selector(heartPlus:) forControlEvents:UIControlEventTouchUpInside];
UILabel * labelHeart = [[[UILabel alloc] initWithFrame:CGRectMake(280,100,20,10)] init];
labelHeart.tag = someID;
// Add each element to the msgView
[msgView addSubview:buttonUpdate];
[msgView addSubview:labelHeart];
There is still some missing code, but as far as I can see you have the error in heartPlus method and viewWithTag does not return the correct view. Therefore the assignment of backgroundColor fails. The explanation is below:
You are first getting the parent view of view that contains UIButton and UILabel. I assume your view hierarchy looks something like this:
UITableViewCell
UIView (tag: someID)
UILabel (tag: someID)
UIButton (tag: someID)
So, if I assume there is no error in the line below and that it returns correct UITableViewCell (or whatever other view is the parent of both UILabel and UIButton):
UIView * view = (UIView *)[self.view.superview viewWithTag:id_num];
We can clearly see the problem with both UILabel and UIButton having the same tags. So if you ask the UITableViewCell for the view with tag, it will simply fail - returns nil.
There are multiple solutions to this problem, but the problem remains the same.
Do not give the UILabel the same tag as UIButton.
I assume you are a beginner with Objective-C so I would suggest you first look into some tutorials of how UIViews work. But to make it easier for you, here are few options:
Create a custom subclass of the UIView with UIView properties.
Use unique tags for UILabel and for UIButton. To find the correct id_num on click, use introspection and sender's superview, which is passed to you in a method.
You could easily loop through UIView's subviews property (which is an array) and find the UILabel manually - this works, if there is only one UILabel or you are looking for all of them.
But in either case, you need to rethink of how UITableView works. It is not a good practice to ask self.view.superview for viewWithTag and your method could already fail at this point.
I'm making telnet program and I have everything resolved but the text output.
I want it to have console look and feel, and basic controls like UITextField or UILabel do not work at all for this.
Is there any custom control to do this?
How can I write one myself?
You can use UITextView to display text and UITextField to input the text and override textFieldShouldReturn: method:
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
NSString* inputString = textField.text;
[inputString lowercaseString];
// when you type 'clear' clear output view
if ([inputString isEqualToString:#"clear"])
{
// Your text view outlet to display the data
[self.outputTextView clear];
}
else
{
[self.outputTextView setText:inputString concatenate:YES];
// Your text field outlet to input the data
[self.inputTextField setText:#""];
return YES;
}
Remember to set up text field delegate for input text field.
I need to check if some object has text property. For example it can be an UIButton or an UILabel. But there is an issue between properties that display text for an UIButton and for an UILabel.
This is the difference:
For an UIButton we set text using setTitle: method, but for an UILabel we using another one named setText:
What I need to do with this:
I need to get all subviews and if these subviews have text property I need to change this property value with some text.
So of course I can check class of object and setup needed property, but maybe we have another approach to do it without checking class of object.
for (id item in [self.view subviews])
{
if ([item respondsToSelector:#selector(text)])
[item setText:#"text"]; // change text for UILabel
else if ( [item respondsToSelector:#selector(setTitle:forState:)])
[item setTitle:#"text" forState:UIControlStateNormal]; // change text for UIButton
}
I am developing an application where user has to write some information. For this purpose I need a UITextField which is multi-line (in general UITextField is a single line).
As I'm Googling I find a answer of using UITextView instead of UITextfield for this purpose.
UITextField is specifically one-line only.
Your Google search is correct, you need to use UITextView instead of UITextField for display and editing of multiline text.
In Interface Builder, add a UITextView where you want it and select the "editable" box. It will be multiline by default.
You can fake a UITextField using UITextView. The problem you'll have is that you lose the place holder functionality.
If you choose to use a UITextView and need the placeholder, do this:
In your viewDidLoad set the color and text to placeholders:
myTxtView.textColor = .lightGray
myTxtView.text = "Type your thoughts here..."
Then make the placeholder disappear when your UITextView is selected:
func textViewDidBeginEditing (textView: UITextView) {
if myTxtView.textColor.textColor == ph_TextColor && myTxtView.isFirstResponder() {
myTxtView.text = nil
myTxtView.textColor = .white
}
}
When the user finishes editing, ensure there's a value. If there isn't, add the placeholder again:
func textViewDidEndEditing (textView: UITextView) {
if myTxtView.text.isEmpty || myTxtView.text == "" {
myTxtView.textColor = .lightGray
myTxtView.text = "Type your thoughts here..."
}
}
Other features you might need to fake:
UITextField's often capitalize every letter, you can add that feature to UITableView:
myTxtView.autocapitalizationType = .words
UITextField's don't usually scroll:
myTxtView.scrollEnabled = false
Ok I did it with some trick ;) First build a UITextField and increased it's size like this :
CGRect frameRect = textField.frame;
frameRect.size.height = 53;
textField.frame = frameRect;
Then build a UITextView exactly in the same area that u made my UITextField, and deleted its background color. Now it looks like that u have a multiple lines TextField !
Besides from the multiple line behaviour, the main difference between UITextView and UITextField is that the UITextView does not propose a placeholder. To bypass this limitation, you can use a UITextView with a "fake placeholder."
See this SO question for details: Placeholder in UITextView.
If you must have a UITextField with 2 lines of text, one option is to add a UILabel as a subview of the UITextField for the second line of text. I have a UITextField in my app that users often do not realize is editable by tapping, and I wanted to add some small subtitle text that says "Tap to Edit" to the UITextField.
CGFloat tapLlblHeight = 10;
UILabel *tapEditLbl = [[UILabel alloc] initWithFrame:CGRectMake(20, textField.frame.size.height - tapLlblHeight - 2, 70, tapLlblHeight)];
tapEditLbl.backgroundColor = [UIColor clearColor];
tapEditLbl.textColor = [UIColor whiteColor];
tapEditLbl.text = #"Tap to Edit";
[textField addSubview:tapEditLbl];
Yes, a UITextView is what you're looking for. You'll have to deal with some things differently (like the return key) but you can add text to it, and it will allow you to scroll up and down if there's too much text inside.
This link has info about making a screen to enter data:
create a data entry screen
'override func viewDidLoad(){
super.viwDidLoad()
YOUR_TEXT_VIEW.textColor = UIColor.gray // YOUR PREFERRED PLACEHOLDER COLOR HERE
YOUR_TEXT_VIEW.text = "YOUR DEFAULT PLACEHOLDER TEXT HERE"
YOUR_TEXT_VIEW.delegate = self
}'
This code block is enough. Please don't forget to set delegate in viewDidLoad or by storyboard just before to use the following extension:
extension YOUR_VIEW_CONTROLLER: UITextViewDelegate {
func textViewDidBeginEditing (_ textView: UITextView) {
if YOUR_TEXT_VIEW.text.isEmpty || YOUR_TEXT_VIEW.text == "YOUR DEFAULT PLACEHOLDER TEXT HERE" {
YOUR_TEXT_VIEW.text = nil
YOUR_TEXT_VIEW.textColor = .red // YOUR PREFERED COLOR HERE
}
}
func textViewDidEndEditing (_ textView: UITextView) {
if YOUR_TEXT_VIEW.text.isEmpty {
YOUR_TEXT_VIEW.textColor = UIColor.gray // YOUR PREFERED PLACEHOLDER COLOR HERE
YOUR_TEXT_VIEW.text = "YOUR DEFAULT PLACEHOLDER TEXT HERE"
}
}
}
use UITextView instead of UITextField
A supplement to h4xxr's answer in the above, an easier way to adjust the height of the UITextField is to select square border style in the attribute inspectors->Text Field. (By default, the border style of a UITextfield is ellipse.)
Reference: Answered Brian in here : How to set UITextField height?
Use textView instead then conform with its delegate, call the textViewDidChange method inside of that method call tableView.beginUpdates() and tableView.endUpdates() and don't forget to set rowHeight and estimatedRowHeight to UITableView.automaticDimension.
There is another option that worked for me:
Subclass UITextField and overwrite:
- (void)drawTextInRect:(CGRect)rect
In this method you can for example:
NSDictionary *attributes = #{ NSFontAttributeName : self.font,
NSForegroundColorAttributeName : self.textColor };
[self.text drawInRect:verticalAlignedRect withAttributes:attributes];
This code will render the text using as many lines as required if the rect has enough space. You could specify any other attribute depending on your needs.
Do not use:
self.defaultTextAttributes
which will force one line text rendering