iOS 菜单显示一种方式

怼烎@ 2022-08-20 03:26 98阅读 0赞

# 前言 #

前几天在群里看见一个朋友说这种菜单用哪个控件写比较好，有的人说用UICollectionView,有的说用UIButton自己计算。我今天上午正好暂时没接口。写了一下，最后还是感觉用UIButton比较好用，没有必要用UICollectionView。写个Demo,大家如果需要这个思路可以看一下。  
[Demo地址][Demo]

# 正文 #

最重要的一个方法就是怎么让菜单按钮显示正常：

/** * 数据显示 */
    - (void)loadData:(UIView *)bgView whatArray:(NSMutableArray *)array
    {
       __block CGFloat weakX = locaX;
       __block CGFloat weakY = locaY;
        for(int i = 0;i < array.count;i++)
        {
            [UIView animateWithDuration:0.2 delay:0.1 usingSpringWithDamping:0.5 initialSpringVelocity:0.1 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
                //创建按钮
                UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
                btn.tag = i+1;
                //判断是否是选中的数组
                BOOL isS = NO;
                if (array.count == self.sMenuArray.count) {
                    isS = YES;
                    for(int i=0; i<array.count;i++)
                    {
                        NSString *str1 = array[i];
                        NSString *str2 = self.sMenuArray[i];
                        if (![str1 isEqualToString:str2]) {
                            isS = NO;
                            break;
                        }
                    }
                }
                if (isS == YES) {
                    btn.tag = i+1+100;
                }
                [btn setTitle:array[i] forState:UIControlStateNormal];
                btn.titleLabel.font = [UIFont systemFontOfSize:14];
                [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
                [btn addTarget:self action:@selector(doSomething:) forControlEvents:UIControlEventTouchUpInside];
                //计算btn的宽度
                CGSize btnSize = [array[i] boundingRectWithSize:CGSizeMake(self.view.frame.size.width, 30) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:14]} context:nil].size;
                CGFloat btnW = btnSize.width + 2 * locaX;
                CGFloat btnH = 30;
                //判断一下按钮是否超出
                if ((weakX + btnW) >= self.view.frame.size.width - locaX) {
                    weakX = locaX;
                    weakY +=btnH + 5;
                }
    
                btn.frame = CGRectMake(weakX, weakY, btnW, btnH);
    
                //判断下一次xy位置
                weakX += btnW + locaX;
                if (weakX >= self.view.frame.size.width - locaX) {
                    weakX = locaX;
                    weakY += btnH + 5;
                }
                [bgView addSubview:btn];
                btn.layer.cornerRadius = btn.frame.size.width /10;
                btn.layer.masksToBounds = YES;
                btn.layer.borderWidth = 1;
                btn.layer.borderColor = [UIColor colorWithWhite:0.000 alpha:0.105].CGColor;
    
            } completion:^(BOOL finished) {
    
            }];
    
        }
    }

知道了如何显示菜单按钮之后，其他的就简单了。点击菜单按钮把它移动到常用菜单处:

/** * 按钮事件 * * @param sender <#sender description#> */
    - (void)doSomething:(UIButton *)sender
    {
        //判断按钮处于哪个区域
        if (sender.tag<100) {
            // 从menuarray取出这个数据放到smenuarray里面
            NSInteger index = sender.tag - 1;
            [self.sMenuArray addObject:self.menuArray[index]];
            [self.menuArray removeObjectAtIndex:index];
        }else
        {
            // 从smenuarray取出这个数据放到smenuarray里面
            NSInteger index = sender.tag - 1 - 100;
            [self.menuArray addObject:self.sMenuArray[index]];
            [self.sMenuArray removeObjectAtIndex:index];
        }
        //数据重新加载,把上一次数据显示去除
        for(UIView *view in [self.dataView subviews])
        {
            [view removeFromSuperview];
        }
        for (UIView *view in [self.selectedView subviews]) {
            [view removeFromSuperview];
        }
        [self loadData:self.dataView whatArray:self.menuArray];
        [self loadData:self.selectedView whatArray:self.sMenuArray];
    }

在代码里我已经把每一步操作说的很清楚了，大家如果感兴趣可以去下载运行一下。  
运行截图：  
![这里写图片描述][20160128132804533]  
![这里写图片描述][20160128132816041]  
![这里写图片描述][20160128132828916]

# 结语 #

我是程序员，我为自己代言

[Demo]: https://github.com/sunyunfei/MenuDemo.git
[20160128132804533]: /images/20220731/36abdf53e0934a668bd347ebe86c1f72.png
[20160128132816041]: /images/20220731/97c5b103ddb6484f966c94196d97b1c9.png
[20160128132828916]: /images/20220731/2d25374c6cb24e989040903a5011c989.png