iOS Question Gradient color with direction

[Chris Guanzon]

Hello, can it create a gradient color with direction like in b4a?

In b4a, I used this code:

Dim gradient As GradientDrawable
Dim clrs(2) As Int

clrs(0) = btnGradientColor1
clrs(1) = btnGradientColor2
gradient.Initialize("TR_BL", clrs)

Is there a "TR_BL" gradient for b4i?

https://www.b4x.com/android/forum/threads/set-gradient-color-to-a-view.65242/

 

[Erel]

You can use BitmapCreator to create any gradient you like and then put it in an ImageView behind the actual view.

 

[Chris Guanzon]

You can use BitmapCreator to create any gradient you like and then put it in an ImageView behind the actual view.

Can I use this to button and panel?

 

[Erel]

Put an ImageView inside a panel or put an ImageView behind the button.

If you want to use the inline code to make the gradient then add these two lines:

   gradient.startPoint = CGPoint(x: 0, y: 0);
    gradient.endPoint = CGPoint(x: 1, y: 1 );

 

[Chris Guanzon]

Put an ImageView inside a panel or put an ImageView behind the button.

If you want to use the inline code to make the gradient then add these two lines:

   gradient.startPoint = CGPoint(x: 0, y: 0);
    gradient.endPoint = CGPoint(x: 1, y: 1 );

I added these two lines

   gradient.startPoint = CGPoint(x: 0, y: 0);
    gradient.endPoint = CGPoint(x: 1, y: 1 );

#If OBJC
- (void)SetGradient: (UIView*) View :(UIColor*) Color1 :(UIColor*) Color2{
    CAGradientLayer *gradient = [CAGradientLayer layer];
    gradient.startPoint = CGPoint(x: 0, y: 0);
    gradient.endPoint = CGPoint(x: 1, y: 1 );
    gradient.colors = [NSArray arrayWithObjects:(id)Color1.CGColor, (id)Color2.CGColor, nil];
    gradient.frame = View.bounds;
    [View.layer insertSublayer:gradient atIndex:0];
   
}
#end if

but got an error while compiling.

Error:

Error: ** BUILD FAILED **


The following build commands failed:
    CompileC /Users/arthurgalenzoga/Downloads/B4iBuildServer/UploadedProjects/<user id>/build/B4iProject.build/Release-iphoneos/B4iProject.build/Objects-normal/arm64/b4i_main.o /Users/arthurgalenzoga/Downloads/B4iBuildServer/UploadedProjects/<user id>/B4iProject/b4i_main.m normal arm64 objective-c com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)

 

[Erel]

Correct code:

gradient.startPoint = CGPointMake(0, 0);
gradient.endPoint = CGPointMake(1, 1);

 

[Chris Guanzon]

Correct code:

gradient.startPoint = CGPointMake(0, 0);
gradient.endPoint = CGPointMake(1, 1);

thanks sir @Erel , here's the code I used:

- (void)SetGradient: (UIView*) View :(UIColor*) Color1 :(UIColor*) Color2{
    CAGradientLayer *gradient = [CAGradientLayer layer];
    
    gradient.frame = View.bounds;   
    gradient.startPoint = CGPointZero;
    gradient.endPoint = CGPointMake(1, 1);
    gradient.colors = [NSArray arrayWithObjects:(id)Color1.CGColor, (id)Color2.CGColor, nil];
    
    [View.layer insertSublayer:gradient atIndex:0];
}