iOS Question Please add two ints as input to this OBJC function

[Sandman]

About a year ago @JordiCP made a nice solution for adjusting the link color in textviews. It can be found here:

[SOLVED] CSBuilder clickable link color in B4i. How to change it?

I wanted to update an already existing B4i app and thought it wouldn't take me much 😁...but here I am. In this version, some explanatory texts are to be added to a TextView, and some parts of which should be clickable. So I thought of using CSBuilder. However, by design, the clickable parts...

www.b4x.com

However, he hardcoded the colors in the OBJC code, and I would like them to be inputs instead. I have tried for almost a full day to achieve this seemingly basic adjustment but I just can't seem to figure it out. Therefore I'm asking if someone in the forum can help out?

In my situation I actually have the colors defined as hex strings, but I can easily convert them to ints using this function by Erel:

[B4X] HexToColor and ColorToHex

Converts hex color strings to a color int value and vice versa: Private Sub ColorToHex(clr As Int) As String Dim bc As ByteConverter Return bc.HexFromBytes(bc.IntsToBytes(Array As Int(clr))) End Sub Private Sub HexToColor(Hex As String) As Int Dim bc As ByteConverter If...

www.b4x.com

This is how far I've come by searching the interwebs and the stack overflows, which is not a working solution:

Me.As(NativeObject).RunMethod("changeTextViewLinkAttributes:", Array(myTextView, 16711680, 16711680))

(The 16711680 is simply #FF0000 as Int, hardcoded at the moment while testing.)

#if OBJC
-(void) changeTextViewLinkAttributes:(UITextView *) textView: (int) linkColor: (int) underlineColor {

    NSDictionary *linkAttributes = @{

        NSForegroundColorAttributeName:
            [UIColor
                colorWithRed:((float)((linkColor & 0xFF0000) >> 16))/255.0 \
                green:((float)((linkColor & 0x00FF00) >>  8))/255.0 \
                blue:((float)((linkColor & 0x0000FF) >>  0))/255.0 \
                alpha:1.0],

        NSUnderlineColorAttributeName: 
            [UIColor
                colorWithRed:((float)((underlineColor & 0xFF0000) >> 16))/255.0 \
                green:((float)((underlineColor & 0x00FF00) >>  8))/255.0 \
                blue:((float)((underlineColor & 0x0000FF) >>  0))/255.0 \
                alpha:1.0],

        NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)
        };

    textView.linkTextAttributes = linkAttributes;  
}
#End If

The error for the above is...

Method not found: changeTextViewLinkAttributes: <snip>

...so I assume there is something I just don't understand when it comes to the OBJC parameters.

 

[Erel]

1.

-(void) changeTextViewLinkAttributes:(UITextView *) textView :(int)linkColor :(int) underlineColor {

2.

Me.As(NativeObject).RunMethod("changeTextViewLinkAttributes:::", Array(myTextView, 16711680, 16711680))

 

[Sandman]

Awesome, thank you!

And for the readers of the thread that, like me, couldn't really see what the difference was:

1. The call to the function now uses three colons. (Perhaps one colon per parameter?)
2. In OBJC it seems a parameter in the signature must end with a space and THEN a colon. I had done the opposite.

 

[Erel]

1. True.
2. The confusing syntax is related to the parameters names kept empty. Another example that will clarify the syntax:

-(void) changeTextViewLinkAttributes:(UITextView *) textView LinkColorParam:(int)linkColor UnderlineParam:(int) underlineColor {
Me.As(NativeObject).RunMethod("changeTextViewLinkAttributes:LinkColorParam:UnderlineParam:", Array(myTextView, 16711680, 16711680))
'and calling from Objective C:
[self changeTextViewLinkAttributes:TextView1 LinkColorParam:1234 UnderlineParam:5678]

 

[Sandman]

It sure is a different syntax. It kind of looks like named parameters, but as far as I can tell it really isn't. Found some more to read about it here:

How do I pass multiple parameters in Objective-C?

I have read several of the post about Objective-C method syntax but I guess I don't understand multiple names for a method. I'm trying to create a method called getBusStops with NSString and

stackoverflow.com

Specifically this answer:

How do I pass multiple parameters in Objective-C?

I have read several of the post about Objective-C method syntax but I guess I don't understand multiple names for a method. I'm trying to create a method called getBusStops with NSString and

stackoverflow.com

(I realize you know all this, Erel, I'm just adding the links above for other's - and my future - benefit.)