Re: Control default color inconsistencies

[Andreas Falkenhahn]

On 14.12.2016 at 18:47 Gary L. Wade wrote:

> Set the background color of self.view to something other than black
> and your button and label will be more visible.

Thanks, that was indeed the problem. UIButton and UILabel both seem to use
a clear background color as the default, which resulted in the UIView's
background color, which was black, shining through them. 

I'm now stealing the default background color of the UITableView for my
UIView to get a consistent look, i.e. I'm doing the following in my
view controller's viewDidLoad():

self.view.backgroundColor = tableView.backgroundColor;

Everything looks correctly then.

-- 
Best regards,
 Andreas Falkenhahnmailto:andr...@falkenhahn.com

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Re: Control default color inconsistencies

[Quincey Morris]

On Dec 14, 2016, at 09:38 , Andreas Falkenhahn  wrote:
> 
> But, as I wrote in
> my last mail, this default look is pretty confusing and irritating because
> background and foreground color aren't consistent at all.

You’re assuming that the “default” colors of the various controls (the colors 
you get if you don’t configure colors) are supposed to be the “standard” 
colors. What you’ve discovered is that this isn’t true. When you create 
controls programmatically, you take on the responsibility of deciding how your 
app should look. If you decide it should look like other apps, then it’s also 
your responsibility to implement that. If you implement that, it’s also your 
responsibility to change your app when the look of the rest of the apps changes 
with the iOS version.

Looking at these controls as configured by IB, I see that the "IB default" is 
typically a clear background. 

— I’m not sure why your UILabel defaults to the same color as the foreground, 
but I don’t see why you should be concerned about programmatically setting its 
background color to clear. The IB default foreground color is black.

— The IB default background for a UIView is gray, and the IB default background 
for a UITableView is clear. Cell views in IB have a white background. That 
means that section headers and footers let the gray background show through, 
and details rows have white backgrounds.

— The IB default color for button text is the tint color, which happens to be 
blue.

According to that information, you should set the UILabel background to clear 
or white, and set your cell view backgrounds to white, and leave everything 
else alone.

Also, take a look at view appearances. You might be able to use that API to 
ensure a consist look for all your controls without configuring every property 
manually for each UIControl instance.

I’d emphasize that if you set colors manually, you can’t necessarily expect 
that iOS will adjust your colors for new system designs in the future, whereas 
it may do this for apps that use IB-configured controls. That’s something you 
might lose by opting out of IB.
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Re: Control default color inconsistencies

[Gary L. Wade]

Set the background color of self.view to something other than black and your 
button and label will be more visible. I believe the color for your table view 
is a UIColor defined as a category in UITableView.h or close to there.
--
Gary L. Wade (Sent from my iPad)
http://www.garywade.com/

> On Dec 14, 2016, at 9:38 AM, Andreas Falkenhahn  
> wrote:
> 
>> On 14.12.2016 at 17:54 じょいすじょん wrote:
>> 
>> Nobody can guess what you are actually doing.
>> Please share some code so people can help you.
> 
> There is not much code to share. My code just creates UILabel, UIButton,
> and UITableView with absolutely minimal customization, the intention
> being to check out the default look of those controls. But, as I wrote in
> my last mail, this default look is pretty confusing and irritating because
> background and foreground color aren't consistent at all.
> 
> I'd like to avoid hard-coding specific colors as this is bad GUI coding
> practice on the desktop systems I come from. I'd like iOS to use the
> default colors instead but I'm not sure how to do this.
> 
> For reference, here is how I create the objects:
> 
>UIScreen *myScreen = [UIScreen mainScreen];
>CGRect rect = [myScreen bounds];
> 
>// results in a UILabel that has black background and foreground, i.e. 
> text is unreadable
>UILabel *header1 = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 
> rect.size.width, 48)];
>header1.text = @"Label test";
>[self.view addSubview:header1];
> 
>// results in gray background with black text
>UITableView *tableView = [[UITableView alloc] 
> initWithFrame:CGRectMake(0, 48, rect.size.width, rect.size.height - (48 + 
> 80))];
>tableView.dataSource = self;
>tableView.delegate = self;
>tableView.autoresizingMask = 
> UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth;
>[tableView registerClass:[UITableViewCell class] 
> forCellReuseIdentifier:@"Cell"];
>[tableView reloadData];
>[self.view addSubview:tableView];
> 
>// results in black background with blue label text
>UIButton *optionsButton = [UIButton 
> buttonWithType:UIButtonTypeRoundedRect];
>[optionsButton addTarget:self action:@selector(clickOptions:) 
> forControlEvents:UIControlEventTouchUpInside];
>[optionsButton setFrame:CGRectMake(0, rect.size.height - 80, 
> rect.size.width, 80)];
>[optionsButton setTitle:@"Button test" forState:UIControlStateNormal];
>[optionsButton setExclusiveTouch:YES];
>[self.view addSubview:optionsButton];
> 
> The controls are created in a UIViewController inside the viewDidLoad() 
> method. This
> UIViewController is then set as the UIWindow's rootViewController.
> 
> -- 
> Best regards,
> Andreas Falkenhahnmailto:andr...@falkenhahn.com
> 


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Re: Control default color inconsistencies

[Andreas Falkenhahn]

On 14.12.2016 at 18:41 Alex Zavatone wrote:

> On Dec 14, 2016, at 9:47 AM, Andreas Falkenhahn wrote:

> I'm creating my GUI programmatically. It simply consists of a UILabel,
> a UITableView and two UIButtons.

> Mac OS or iOS?  Please state the specifics first so that we can
> stop reading if we don't have experience in the area of your problem.  Thanks.

Huh? Aren't UIButton and UITableView iOS-specific with NSButton and
NSTableView being the macOS equivalents?

But to answer your question: It's iOS but I thought you could've guessed
that because AFAIU UIButton and the likes are UIKit which is iOS.

-- 
Best regards,
 Andreas Falkenhahnmailto:andr...@falkenhahn.com

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Re: Control default color inconsistencies

[Alex Zavatone]

On Dec 14, 2016, at 9:47 AM, Andreas Falkenhahn wrote:

> I'm creating my GUI programmatically. It simply consists of a UILabel,
> a UITableView and two UIButtons.

Mac OS or iOS?  Please state the specifics first so that we can stop reading if 
we don't have experience in the area of your problem.  Thanks.
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Re: Control default color inconsistencies

[Andreas Falkenhahn]

On 14.12.2016 at 17:54 じょいすじょん wrote:

> Nobody can guess what you are actually doing.
> Please share some code so people can help you.

There is not much code to share. My code just creates UILabel, UIButton,
and UITableView with absolutely minimal customization, the intention
being to check out the default look of those controls. But, as I wrote in
my last mail, this default look is pretty confusing and irritating because
background and foreground color aren't consistent at all.

I'd like to avoid hard-coding specific colors as this is bad GUI coding
practice on the desktop systems I come from. I'd like iOS to use the
default colors instead but I'm not sure how to do this.

For reference, here is how I create the objects:

UIScreen *myScreen = [UIScreen mainScreen];
CGRect rect = [myScreen bounds];

// results in a UILabel that has black background and foreground, i.e. 
text is unreadable
UILabel *header1 = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 
rect.size.width, 48)];
header1.text = @"Label test";
[self.view addSubview:header1];

// results in gray background with black text
UITableView *tableView = [[UITableView alloc] 
initWithFrame:CGRectMake(0, 48, rect.size.width, rect.size.height - (48 + 80))];
tableView.dataSource = self;
tableView.delegate = self;
tableView.autoresizingMask = 
UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth;
[tableView registerClass:[UITableViewCell class] 
forCellReuseIdentifier:@"Cell"];
[tableView reloadData];
[self.view addSubview:tableView];

// results in black background with blue label text
UIButton *optionsButton = [UIButton 
buttonWithType:UIButtonTypeRoundedRect];
[optionsButton addTarget:self action:@selector(clickOptions:) 
forControlEvents:UIControlEventTouchUpInside];
[optionsButton setFrame:CGRectMake(0, rect.size.height - 80, 
rect.size.width, 80)];
[optionsButton setTitle:@"Button test" forState:UIControlStateNormal];
[optionsButton setExclusiveTouch:YES];
[self.view addSubview:optionsButton];

The controls are created in a UIViewController inside the viewDidLoad() method. 
This
UIViewController is then set as the UIWindow's rootViewController.

-- 
Best regards,
 Andreas Falkenhahnmailto:andr...@falkenhahn.com


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Re: Control default color inconsistencies

[Gary L. Wade]

Seeing code and how you have things visually laid out will help, but most 
likely what you think are black backgrounds may be clear backgrounds showing 
through to another view or super view that has black as its background color. 
You may have very valid reasons for doing this in code, but before doing that, 
try working through things in Interface Builder first so you get an idea of 
what you need to do.
--
Gary L. Wade (Sent from my iPad)
http://www.garywade.com/

> On Dec 14, 2016, at 7:47 AM, Andreas Falkenhahn  
> wrote:
> 
> I'm creating my GUI programmatically. It simply consists of a UILabel,
> a UITableView and two UIButtons.
> 
> When creating those three controls I've noticed that they all seem to
> use different color schemes by default which makes the GUI look rather
> silly.
> 
> Here are my observations:
> 
> 1) By default, UILabel seems to set both background and text color to
> black, i.e. nothing is readable before you change the colors to some
> more meaningful values.
> 
> 2) By default, UITableView appears with a gray background and black
> text on top.
> 
> 3) By default, UIButton appears with a black background and blue (!)
> text on top.
> 
> Is there any rationale why all three controls seem to use entirely
> different color schemes by default here? 
> 
> When writing desktop GUIs it's bad practice to use custom color schemes
> because they might clash with the user's theme settings. Doesn't such
> a paradigm apply to iOS as well? Or am I really forced to explicitly
> set foreground and background colors for each UI control? I'd really
> prefer to use the default iOS look instead. On Android I don't have to
> set background and foreground colors either, the OS will automatically
> use some meaningful and consistent (!) default colors.
> 
> This makes me wonder if there is a default iOS color scheme for apps
> at all? Or are all apps supposed to define their own color scheme?
> If there is a default iOS color scheme, why don't the controls use
> it then when not specifying any colors?
> 
> It's all quite confusing... I hope somebody can shed some more light
> onto this. But please no lectures on that I should use Interface Builder,
> Storyboard, or whatever it is called now instead, I really like to do
> things manually - always have, always will ;)
> 
> -- 
> Best regards,
> Andreas Falkenhahn  mailto:andr...@falkenhahn.com
> 


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Re: Control default color inconsistencies

[じょいすじょん]

> On 2016 Dec 15, at 0:47, Andreas Falkenhahn  wrote:
> 
> I'm creating my GUI programmatically. It simply consists of a UILabel,
> a UITableView and two UIButtons.
> 
> When creating those three controls I've noticed that they all seem to
> use different color schemes by default which makes the GUI look rather
> silly.
> 
> Here are my observations:
> 
> 1) By default, UILabel seems to set both background and text color to
> black, i.e. nothing is readable before you change the colors to some
> more meaningful values.
> 
> 2) By default, UITableView appears with a gray background and black
> text on top.
> 
> 3) By default, UIButton appears with a black background and blue (!)
> text on top.
> 
> Is there any rationale why all three controls seem to use entirely
> different color schemes by default here? 
> 
> When writing desktop GUIs it's bad practice to use custom color schemes
> because they might clash with the user's theme settings. Doesn't such
> a paradigm apply to iOS as well? Or am I really forced to explicitly
> set foreground and background colors for each UI control? I'd really
> prefer to use the default iOS look instead. On Android I don't have to
> set background and foreground colors either, the OS will automatically
> use some meaningful and consistent (!) default colors.
> 
> This makes me wonder if there is a default iOS color scheme for apps
> at all? Or are all apps supposed to define their own color scheme?
> If there is a default iOS color scheme, why don't the controls use
> it then when not specifying any colors?
> 
> It's all quite confusing... I hope somebody can shed some more light
> onto this. But please no lectures on that I should use Interface Builder,
> Storyboard, or whatever it is called now instead, I really like to do
> things manually - always have, always will ;)
> 
> -- 
> Best regards,
> Andreas Falkenhahn  mailto:andr...@falkenhahn.com

Nobody can guess what you are actually doing.
Please share some code so people can help you.

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Control default color inconsistencies

[Andreas Falkenhahn]

I'm creating my GUI programmatically. It simply consists of a UILabel,
a UITableView and two UIButtons.

When creating those three controls I've noticed that they all seem to
use different color schemes by default which makes the GUI look rather
silly.

Here are my observations:

1) By default, UILabel seems to set both background and text color to
black, i.e. nothing is readable before you change the colors to some
more meaningful values.

2) By default, UITableView appears with a gray background and black
text on top.

3) By default, UIButton appears with a black background and blue (!)
text on top.

Is there any rationale why all three controls seem to use entirely
different color schemes by default here? 

When writing desktop GUIs it's bad practice to use custom color schemes
because they might clash with the user's theme settings. Doesn't such
a paradigm apply to iOS as well? Or am I really forced to explicitly
set foreground and background colors for each UI control? I'd really
prefer to use the default iOS look instead. On Android I don't have to
set background and foreground colors either, the OS will automatically
use some meaningful and consistent (!) default colors.

This makes me wonder if there is a default iOS color scheme for apps
at all? Or are all apps supposed to define their own color scheme?
If there is a default iOS color scheme, why don't the controls use
it then when not specifying any colors?

It's all quite confusing... I hope somebody can shed some more light
onto this. But please no lectures on that I should use Interface Builder,
Storyboard, or whatever it is called now instead, I really like to do
things manually - always have, always will ;)

-- 
Best regards,
 Andreas Falkenhahn  mailto:andr...@falkenhahn.com

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