ios - 如何为 UIButton 创建 BOOL 属性以进行选中选择

Question

我从数组中创建了许多带有循环的按钮，但我希​​望在单击任何按钮时，我可以使用一个名称为 Selected 的 bool 属性来检查选择状态此按钮。

当我点击它的任何按钮时，将背景更改为红色，当取消选择时，将背景更改为蓝色。

请指导我如何为任何按钮创建一个属性。

这是我的代码:

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    NSMutableArray *arrayString = [[NSMutableArray alloc]initWithObjects:@"Mohammad",@"Hamidreza",@"Ahmad",@"Amirhossein",@"javad",@"asdasddasdsdasd", nil];

    UIFont *myFont = [UIFont fontWithName:@"Helvetica" size:20];
    CGFloat x = 5;
    CGFloat y = 80;
    for (NSString *text in arrayString) {
        UIButton *button = [[UIButton alloc]init];
        CGFloat width = [self widthOfString:text withFont:myFont];
        CGFloat height = [self heightOfString:text withFont:myFont];
        if ((x + width) > 320) {
            NSLog(@"after line");
            x = 5;
            y += (height+20)+10;
            button.frame = CGRectMake(x, y, width+20, height+20);
            [button setTitle:text forState:UIControlStateNormal];
            button.backgroundColor = [UIColor redColor];
            [self.view addSubview:button];
            x += (width+20)+10;

        }
        else {
            NSLog(@"this line");
            button.frame = CGRectMake(x, y, width+20, height+20);
            [button setTitle:text forState:UIControlStateNormal];
            button.backgroundColor = [UIColor redColor];
            [self.view addSubview:button];
            x += (width+20)+10;
        }
        [button addTarget:self action:@selector(Selected:) forControlEvents:UIControlEventTouchUpInside];

    }
}
-(IBAction)Selected:(id)sender{

    if (//check sender button property bool selected) {

    }
    else {

    }
}

Answer 1

试试这段代码:-

- (void)viewDidLoad
{
  [super viewDidLoad];

  [self.button setBackgroundImage:[self imageWithColor:[UIColor redColor]]forState:(UIControlStateHighlighted)];
  [self.button setBackgroundImage:[self imageWithColor:[UIColor redColor]]forState:(UIControlStateSelected)];
  [self.button setBackgroundImage:[self imageWithColor:[UIColor blueColor]] forState:(UIControlStateNormal)];
}

- (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;
}