HaiwaiAdv1/NatureSDK/XenonSDK/XenonOther/BackgroundButton.m

//
//  BackgroundButton.m
//  XenonSDK
//
//  Created by SAGESSE on 2019/5/29.
//  Copyright © 2019 SAGESSE. All rights reserved.
//

#import "BackgroundButton.h"

UIImage* makeImage(UIColor* newValue) {
    if (newValue == nil) {
        return nil;
    }
    CGRect rect = CGRectMake(0, 0, 4, 4);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, newValue.CGColor);
    CGContextFillRect(context, rect);
    UIImage* image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
    
    
}


@implementation BackgroundButton

- (void)setBackgroundColor:(id)backgroundColor {
    [super setBackgroundColor:UIColor.clearColor];
    
    // update background image.
    dispatch_async(dispatch_get_main_queue(), ^{
        
        id n = makeImage([backgroundColor colorWithAlphaComponent:1.0]);
        id h = makeImage([backgroundColor colorWithAlphaComponent:0.8]);

        [self setBackgroundImage:n forState: UIControlStateNormal];
        [self setBackgroundImage:n forState: UIControlStateNormal | UIControlStateSelected];
        
        [self setBackgroundImage:h forState: UIControlStateHighlighted];
        [self setBackgroundImage:h forState: UIControlStateHighlighted | UIControlStateSelected];
    });
}


@end