ios 底部弹出框菜单

在IOS开发中，经常用到底部菜单，这是一个简单的底部弹出菜单的实现

代码如下：

     头文件（.h）
   

#import 

@interface ShareMenuView : UIView
{
    UIButton *_backView;
}

- (void)show;
- (void)hide;

@property(nonatomic,copy)void (^ shareButtonClickBlock)(NSInteger index);

@end

_backView 是菜单弹出时的半透明背景，点击背景菜单消失，show和hide方法是菜单弹出和菜单消失的方法，shareButtonClickBlock是菜单中按钮点击的响应，其中用index来区分菜单中的按钮，也可用代理实现。

   类文件（.m）

#import "ShareMenuView.h"

#define AnimateDuration     0.4

@implementation ShareMenuView



- (instancetype)init{
    
    self = [super init];
    if (self) {
        [self setup];
    }
    return self;
}

- (void)setup{
    
    //弹出菜单，添加半透明背景
    _backView = [UIButton buttonWithType:UIButtonTypeCustom];
    _backView.frame = CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
    _backView.alpha = 0.3;
    _backView.backgroundColor = [UIColor blackColor];
    [_backView addTarget:self action:@selector(backViewClicked:) forControlEvents:UIControlEventTouchUpInside];
    
    self.frame = CGRectMake(0, SCREEN_HEIGHT, SCREEN_WIDTH, ShareMenuHeight);
    self.backgroundColor = [UIColor whiteColor];
    [[[UIApplication sharedApplication] keyWindow] addSubview:self];
    
    NSMutableArray *shareTitleArray = [[NSMutableArray alloc]initWithObjects:@"QQ",@"QQ空间",@"微信",@"朋友圈",@"复制链接", nil];
    NSMutableArray *shareIconArray = [[NSMutableArray alloc]initWithObjects:@"news_control_center_qq",@"news_control_center_zone",@"news_control_center_wechat",@"news_control_center_wechatQ",@"news_control_center_link", nil];
    
    
    for (int i = 0; i < shareIconArray.count; i ++) {
        
        UIButton *itemView = [UIButton buttonWithType:UIButtonTypeCustom];
        itemView.backgroundColor = [UIColor clearColor];
        itemView.tag = i;
        [itemView addTarget:self action:@selector(share:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:itemView];
        
        //图标
        UIImageView *icon = [[UIImageView alloc]init];
        icon.backgroundColor = [UIColor clearColor];
        icon.image = [UIImage imageNamed:shareIconArray[i]];
        [itemView addSubview:icon];
        
        //标题
        UILabel *title = [[UILabel alloc]init];
        title.font = [UIFont systemFontOfSize:13.0f];
        title.backgroundColor = [UIColor clearColor];
        [title sizeToFit];
        title.text = shareTitleArray[i];
        [itemView addSubview:title];
        
        [itemView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.height.equalTo(@70);
            make.width.equalTo(@(SCREEN_WIDTH*1/4));
            make.left.equalTo(self.mas_left).offset((SCREEN_WIDTH*(i%4)/4));
            make.top.equalTo(self.mas_top).offset(70*(i/4));
//            if (i == shareIconArray.count - 1) {
//                make.bottom.equalTo(self.mas_bottom).offset(-10);
//            }
        }];
        
        [icon mas_makeConstraints:^(MASConstraintMaker *make) {
            make.height.width.equalTo(@40);
            make.top.equalTo(itemView.mas_top).offset(10);
            make.centerX.equalTo(itemView.mas_centerX);
        }];
    
        [title mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerX.equalTo(itemView.mas_centerX);
            make.top.equalTo(icon.mas_bottom).offset(5);
            make.bottom.equalTo(itemView.mas_bottom);
        }];
        
    }
}

- (void)backViewClicked:(id)sender{
    [self hide];
}

- (void)show{
    
    [[[UIApplication sharedApplication] keyWindow] addSubview:_backView];
    [[[UIApplication sharedApplication] keyWindow] insertSubview:self aboveSubview:_backView];
    
    [UIView animateWithDuration:AnimateDuration animations:^{
        
        self.frame = CGRectMake(0, SCREEN_HEIGHT - ShareMenuHeight, SCREEN_WIDTH, ShareMenuHeight);
        
    } completion:^(BOOL finished) {
        
    }];
    
}

- (void)hide{
    
    [_backView removeFromSuperview];
    
    [UIView animateWithDuration:AnimateDuration animations:^{
        
        self.frame = CGRectMake(0, SCREEN_HEIGHT, SCREEN_WIDTH, ShareMenuHeight);
        
    } completion:^(BOOL finished) {
        
    }];

    
}

- (void)share:(id)sender{
    UIButton *button = (UIButton *)sender;
    if (self.shareButtonClickBlock) {
        self.shareButtonClickBlock(button.tag);
    }
}

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/

@end

     这里面用到了一个第三方自动布局的框架（名称Masonry， 点击可下载），代码很简单，如果高见，欢迎批评指正。

效果如下：