Weird swift behaviour on UITextField

Question

Scenario: I'm setting the text font and size for my UITextField. They also have placeholders. The code bellow is in my UIViewController:

        let font = UIFont(name: "FlamaSemicondensed-Book", size: 18)

        let attributesDictionary = [NSForegroundColorAttributeName: DefaultSystemColor.DarkRed]

        // Textfileds without borders (and placeholders)
        UsernameTextField.borderStyle = UITextBorderStyle.None
        UsernameTextField.font = font
        UsernameTextField.textColor = DefaultSystemColor.DarkRed
        UsernameTextField.attributedPlaceholder = NSAttributedString(string: "Email", attributes: attributesDictionary)

I'm configuring (in AppDelegate) a global UI setting, that formats all of my UILabels for a certain font size. The code bellow is in my GlobalUISettings class:

    let font = UIFont(name: "FlamaSemicondensed-Book", size: 13)!
    var labelAppearace = UILabel.appearance()
    labelAppearace.font = font

What's weird in here:

When this UITextField is selected and I'm typing the format is the one I set for the text field (the placeholder are OK too).

But when I leave the field it assumes the behaviour of the UILabel.

I know that because if I comment the UILabel format the textField works properly.

Does anybody have any idea why does it happens?

For some strange reason, none of UILabel's properties are tagged as `UIAppearance_Selector`, which means you can get unexpected behaviour when using them. Just a heads up. — EmilioPelaez, May 08 '15 at 14:02
So it's probably a bug on UIKit? I'm quite new to swift. I was just trying to figure out what I was doing wrong :-) — brduca, May 08 '15 at 14:07
No, it's not a bug. `UITextfield` is basically a `UILabel` while not editing, and it follows the appearance traits of it, if you are using an appearance selector, narrow it down to your requirements using `[UILabel appearanceWhenContainedIn:(__unsafe_unretained Class)>, nil];` instead of the more generic one. — M. Porooshani, May 24 '15 at 04:41

score 0 · Answer 1 · answered May 08 '15 at 09:38

0

Try changing the let font to let labelFont because 'font' is global. It might be affecting.

answered May 08 '15 at 09:38

Omer Waqas Khan

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I have a global configuration (UILabel) and in my UIViewController I'm setting the UITextField. They aren't in the same class. – brduca May 08 '15 at 09:43
Check this post on stackoverflow http://stackoverflow.com/questions/8707082/set-a-default-font-for-whole-ios-app – Omer Waqas Khan May 08 '15 at 10:06
My point here is to figure out how formatting an UILabel is affecting the UITextField setup. – brduca May 08 '15 at 10:12
Are you using the UITextField delegates ? – Omer Waqas Khan May 08 '15 at 10:30
No, I'm not. My UIViewController have 2 textFields and a btn. – brduca May 08 '15 at 10:36

score 0 · Answer 2 · answered May 08 '15 at 12:54

0

This is correct behavior.

To change the font of the placeholder you have to add the NSFontAttributeName attribute with the desired font as value to the NSAttributedString you assign to attributedPlaceholder.

Example:

let attributesDictionary = [
    NSFontAttributeName: font,
    NSForegroundColorAttributeName: DefaultSystemColor.DarkRed
]

answered May 08 '15 at 12:54

fluidsonic

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I have no problems setting the font. My problem is when I leave the TextField it assumes the behaviour of the UILabel. – brduca May 08 '15 at 13:45
That's because changing the appearance of ALL UILabels is not a good idea in any case. This also affects system UI in the app and internal views of other controls like UITextField and UIButton. – fluidsonic May 08 '15 at 20:31
It kind of makes sense. I would expect a different behaviour when I set the appearence of a control, but thanks anyway – brduca May 08 '15 at 21:16

Weird swift behaviour on UITextField

2 Answers2