细节

Xcode 11.1 (11A1027)， Swift 5

解决方案

import UIKit

extension UIColor {
    func createOnePixelImage() -> UIImage? {
        let size = CGSize(width: 1, height: 1)
        UIGraphicsBeginImageContext(size)
        defer { UIGraphicsEndImageContext() }
        guard let context = UIGraphicsGetCurrentContext() else { return nil }
        context.setFillColor(cgColor)
        context.fill(CGRect(origin: .zero, size: size))
        return UIGraphicsGetImageFromCurrentImageContext()
    }
}

extension UIButton {
    func setBackground(_ color: UIColor, for state: UIControl.State) {
        setBackgroundImage(color.createOnePixelImage(), for: state)
    }
}

使用

button.setBackground(.green, for: .normal)

你可以子类化UIButton并创建forState。

colourButton.h

#import <UIKit/UIKit.h>

@interface colourButton : UIButton

-(void)setBackgroundColor:(UIColor *)backgroundColor forState:(UIControlState)state;

@end

颜色按钮.m

#import "colourButton.h"

@implementation colourButton
{
    NSMutableDictionary *colours;
}

-(id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];

    // If colours does not exist
    if(!colours)
    {
        colours = [NSMutableDictionary new];  // The dictionary is used to store the colour, the key is a text version of the ENUM
        colours[[NSString stringWithFormat:@"%lu", UIControlStateNormal]] = (UIColor*)self.backgroundColor;  // Store the original background colour
    }

    return self;
}

-(void)setBackgroundColor:(UIColor *)backgroundColor forState:(UIControlState)state
{
    // If it is normal then set the standard background here
    if(state & UIControlStateNormal)
    {
        [super setBackgroundColor:backgroundColor];
    }

    // Store the background colour for that state
    colours[[NSString stringWithFormat:@"%lu", state]]= backgroundColor;
}

-(void)setHighlighted:(BOOL)highlighted
{
    // Do original Highlight
    [super setHighlighted:highlighted];

    // Highlight with new colour OR replace with orignial
    if (highlighted && colours[[NSString stringWithFormat:@"%lu", UIControlStateHighlighted]])
    {
        self.backgroundColor = colours[[NSString stringWithFormat:@"%lu", UIControlStateHighlighted]];
    }
    else
    {
        self.backgroundColor = colours[[NSString stringWithFormat:@"%lu", UIControlStateNormal]];
    }
}

-(void)setSelected:(BOOL)selected
{
    // Do original Selected
    [super setSelected:selected];

    // Select with new colour OR replace with orignial
    if (selected && colours[[NSString stringWithFormat:@"%lu", UIControlStateSelected]])
    {
        self.backgroundColor = colours[[NSString stringWithFormat:@"%lu", UIControlStateSelected]];
    }
    else
    {
        self.backgroundColor = colours[[NSString stringWithFormat:@"%lu", UIControlStateNormal]];
    }
}

@end

注释(这是一个例子，我知道有问题，这里有一些)

我已经使用了一个NSMutableDictionay来存储每个状态的UIColor，我必须为键做一个讨厌的文本转换，因为UIControlState不是一个很好的直Int。如果它在哪里，你可以init一个数组与许多对象，并使用状态作为一个索引。

因此，你有很多困难，例如一个选中&禁用按钮，一些更多的逻辑是需要的。

另一个问题是，如果你试图同时设置多种颜色，我没有尝试过一个按钮，但如果你能这样做，它可能不会工作

 [btn setBackgroundColor:colour forState:UIControlStateSelected & UIControlStateHighlighted];

我假设这是StoryBoard，没有init和initWithFrame如果你需要，可以添加它们。

不确定这是否解决了你所追求的问题，或者是否符合你的总体开发环境，但我想尝试的第一件事是改变触地事件按钮的背景颜色。

选项1:

你需要捕捉两个事件，当用户按下按钮时UIControlEventTouchDown。UIControlEventTouchUpInside和UIControlEventTouchUpOutside将用于当它们释放按钮以返回正常状态时

UIButton *myButton =  [UIButton buttonWithType:UIButtonTypeCustom];
[myButton setFrame:CGRectMake(10.0f, 10.0f, 100.0f, 20.f)];
[myButton setBackgroundColor:[UIColor blueColor]];
[myButton setTitle:@"click me:" forState:UIControlStateNormal];
[myButton setTitle:@"changed" forState:UIControlStateHighlighted];
[myButton addTarget:self action:@selector(buttonHighlight:) forControlEvents:UIControlEventTouchDown];
[myButton addTarget:self action:@selector(buttonNormal:) forControlEvents:UIControlEventTouchUpInside];

选项2:

返回你想要的高亮颜色的图像。这也可以是一个类别。

+ (UIImage *)imageWithColor:(UIColor *)color {
   CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
   UIGraphicsBeginImageContext(rect.size);
   CGContextRef context = UIGraphicsGetCurrentContext();

   CGContextSetFillColorWithColor(context, [color CGColor]);
   CGContextFillRect(context, rect);

   UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
   UIGraphicsEndImageContext();

   return image;
}

然后更改按钮的高亮显示状态:

[myButton setBackgroundImage:[self imageWithColor:[UIColor greenColor]] forState:UIControlStateHighlighted];

下面是Swift中的一种方法，使用UIButton扩展来添加IBInspectable，称为highlightedBackgroundColor。类似于子类化，但不需要子类。

private var HighlightedBackgroundColorKey = 0
private var NormalBackgroundColorKey = 0

extension UIButton {

    @IBInspectable var highlightedBackgroundColor: UIColor? {
        get {
            return objc_getAssociatedObject(self, &HighlightedBackgroundColorKey) as? UIColor
        }

        set(newValue) {
            objc_setAssociatedObject(self,
                &HighlightedBackgroundColorKey, newValue, UInt(OBJC_ASSOCIATION_RETAIN))
        }
    }

    private var normalBackgroundColor: UIColor? {
        get {
            return objc_getAssociatedObject(self, &NormalBackgroundColorKey) as? UIColor
        }

        set(newValue) {
            objc_setAssociatedObject(self,
                &NormalBackgroundColorKey, newValue, UInt(OBJC_ASSOCIATION_RETAIN))
        }
    }

    override public var backgroundColor: UIColor? {
        didSet {
            if !highlighted {
                normalBackgroundColor = backgroundColor
            }
        }
    }

    override public var highlighted: Bool {
        didSet {
            if let highlightedBackgroundColor = self.highlightedBackgroundColor {
                if highlighted {
                    backgroundColor = highlightedBackgroundColor
                } else {
                    backgroundColor = normalBackgroundColor
                }
            }
        }
    }
}

我希望这能有所帮助。

UIButton扩展与Swift 3+语法:

extension UIButton {
    func setBackgroundColor(color: UIColor, forState: UIControlState) {
        UIGraphicsBeginImageContext(CGSize(width: 1, height: 1))
        UIGraphicsGetCurrentContext()!.setFillColor(color.cgColor)
        UIGraphicsGetCurrentContext()!.fill(CGRect(x: 0, y: 0, width: 1, height: 1))
        let colorImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        self.setBackgroundImage(colorImage, for: forState)
    }}

像这样使用它:

YourButton.setBackgroundColor(color: UIColor.white, forState: .highlighted)

最初的回答: https://stackoverflow.com/a/30604658/3659227

你可以重写UIButton的setHighlighted方法。

objective - c

- (void)setHighlighted:(BOOL)highlighted {
    [super setHighlighted:highlighted];

    if (highlighted) {
        self.backgroundColor = UIColorFromRGB(0x387038);
    } else {
        self.backgroundColor = UIColorFromRGB(0x5bb75b);
    }
}

Swift 3.0和Swift 4.1

override open var isHighlighted: Bool {
    didSet {
        backgroundColor = isHighlighted ? UIColor.black : UIColor.white
    }
}