Titanium, change TextField height with animation - ios

Question

In Appcelerator Titanium (iOS project) I have a TextField with height:50. The TextField contains much more text but the fact that its height is set to 50 lets me use the TextField as a preview of the remaining text: under the TextField I have a button and when I tap this button I want to show the entire text, so I would like to animate the TextField from its current height to Ti.UI.SIZE. Is this possible? How? I noticed some iOS properties (eg. anchorPoint) but I could not understand if they can be useful in my case.

Answer 1

You need to use TextArea instead of TextField if you want multiple lines and word wrapping.
I've added the TextArea to a View so I can animate it to both expand and shrink it.
You can try something like this..
// Create the text area for multiple lines and word wrapping.
var messageField = Ti.UI.createTextArea({
backgroundColor: 'transparent',
color: 'black',
height: Ti.UI.SIZE, // Set here the height to SIZE and the view's height to the required one, ex. 50
textAlign: 'left',
value: 'This text should be displayed in more than one line in a text area, but that behavior is not supported by a text field, again, This text should be displayed in more than one line in a text area, but that behavior is not supported by a text field.',
verticalAlign: Ti.UI.TEXT_VERTICAL_ALIGNMENT_TOP,
width: '90%',
font: { fontSize: 20 }
});
// Add the text area to a view to be able to animate it
var view = Titanium.UI.createView({
height: 50, // Required height
top: 250,
width: '90%',
borderColor: 'black',
borderRadius: 10,
borderWidth: 2,
});
view.add(messageField);
// Create animation object
var animation = Titanium.UI.createAnimation();
animation.duration = 1000; // Set the time of animation, 1000 --> 1 second
var button = Ti.UI.createButton({
title: "Show More",
font: { fontSize: 18 },
width: 100,
top: 200
});
var isExpanded = false;
button.addEventListener('click', function() { // Event listener for your button
if(isExpanded) {
isExpanded = false;
animation.height = 50; // Set the animation height to 50 to shrink the view
view.animate(animation); // Start animating the view to the required height
button.title = "Show More";
} else {
isExpanded = true;
animation.height = Ti.UI.SIZE; // Set the animation height to SIZE to make it expand
view.animate(animation); // Start animating the view to the required height
button.title = "Show Less";
}
});
var win = Ti.UI.createWindow({
backgroundColor: 'white'
});
win.add(button);
win.add(view);
win.open();