iOS 多个Button单选

@property (nonatomic,strong) UIButton * selectedButton;

NSArray * titleArr = @[@"试玩幸运奖",@"视频幸运奖"];
    for (int i = 0; i<titleArr.count; i++) {
        
        CGFloat width = infoView.width/2;
        CGFloat height = 50;
        CGFloat x = width * i;
        CGFloat y = 0;
        
        UIButton * btn = [[UIButton alloc]initWithFrame:CGRectMake(x, y, width, height)];
        [infoView addSubview:btn];
        [btn setTitle:titleArr[i] forState:UIControlStateNormal];
        [btn setTitleColor:RGB(153, 153, 153) forState:UIControlStateNormal];
        [btn setTitleColor:RGB(247, 175, 19) forState:UIControlStateDisabled];
        btn.titleLabel.font = [UIFont boldSystemFontOfSize:16];
        [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
        btn.tag = i;
        
        if (i == 0) {
            
            btn.enabled = NO;
            self.selectedButton = btn;
        }
    }

-(void)btnClick:(UIButton *)btn{
    
    // 修改按钮状态
    self.selectedButton.enabled = YES;
    btn.enabled = NO;
    self.selectedButton = btn;
}