UIButton User Defined Run Time Attributes Does not Work

Question

I am trying to draw a border around a custom UIButton. This doesn't work:

why?

Answer 1

click here to solve the problem

Please allow me to repeat it here..^_^

The runtime attribute feature allows us to set a UIColor type, which we need to translate to a CGColor type. To accomplish this, we need to extend the CALayer class with a property that will translate the UIColor to the CGColor we need for the border and shadow.

You can extend classes in Objective-C using a category. I added two properties called borderIBColor and shadowIBColor that are of type UIColor. The IB stands for interface builder. I have to give these properties a unique name to avoid name conflicts with the original properties called borderColor and shadowColor that are of the type CGColor.

Please see the following code.

CALayer+RuntimeAttribute.h

@import QuartzCore;

@interface CALayer (IBConfiguration)

@property(nonatomic, assign) UIColor *borderIBColor;

@end

CALayer+RuntimeAttribute.m

@implementation CALayer (IBConfiguration)

- (void)setBorderIBColor:(UIColor *)color {
    self.borderColor = color.CGColor;
}

- (UIColor *)borderIBColor {
    return [UIColor colorWithCGColor:self.borderColor];
}

@end

Finally, when you set the borderColor of runtime attribute feature in xib or storyboard, please set borderIBColor instead of borderColor. It looks like layer.borderIDColor

Have your fun.

Answer 2

cornerRadius & cornerRadius is CGFloat, use Number to change.

borderColor is CGColor, can't be change by Runtime Attribute. (you can add a category to support UIColor to change CGColor)

Helper Category:

UIView+IBHelper.h:

@interface UIView (IBHelper)

- (void)setBorderColor:(UIColor *)color;

@end

UIView+IBHelper.m:

@implementation UIView (IBHelper)

- (void)setBorderColor:(UIColor *)color
{
    self.layer.borderColor = color.CGColor;
}

@end

and use borderColor in Runtime Attribute. directly