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iOS-弹出TableView,类似Android中的Spinn

2017-06-30  本文已影响246人  Andy_WangPeng

©版权声明:本文为Andy_wangpeng****『原创文章』****,未经允许不得转载。
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序章##

        之前项目中遇到了一个弹出tableView列表的需求,本能的就随手写了一个感觉很丑,然后看到了安卓的弹出控件Spinner还不错,可以根据内容随意调整大小。然后心血来潮,就仿写了一个,自己加了点效果。效果图:

QQ20170630-221322-HD.gif

实现思路##

1.首先肯定是一个tableView加在Windows上,这个tableView 上方一个View遮盖。下方有个View包含『确定』『取消』两个按钮。然后点击背景遮盖,也可以让其消失,总体实现很简单。

在这里利用了下UIControl,当做遮盖,给其添加了一个点击事件。点击即可消失
UIControl: 【UIControl派生自UIView类,所以每个控件都有很多视图的特性,包括附着于其他视图的能力。所有控件都拥有一套共同的属性和方法】。

下面给出部分代码,为什么呢?有些人一味索取,还嫌弃这嫌弃那,也为了大家动手能力、以及思考能力,关键代码已经给出。望大家有兴趣的研究研究。还是那句话****不喜勿喷****。。。

一、初始化控件(UI)

 //1.创建tableview
        _tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStylePlain];
        _tableView.dataSource = self;
        _tableView.delegate = self;
        [self addSubview:_tableView];
        
        //2.列表标题
        _titleView = [[UILabel alloc] initWithFrame:CGRectZero];
        _titleView.font = [UIFont systemFontOfSize:17.0f];
        _titleView.backgroundColor = NAVCOLOR;
        _titleView.text = @"养户列表";
        _titleView.textAlignment = NSTextAlignmentCenter;
        _titleView.textColor = [UIColor whiteColor];
        [self addSubview:_titleView];
        
        
        //3.底部view按钮
        UIView *bottomView = [[UIView alloc] init];
        bottomView.backgroundColor = [UIColor whiteColor];
        [self addSubview:bottomView];
        self.bottomView = bottomView;
        
        //3.1按钮
        _okBtn = [[UIButton alloc] initWithFrame:CGRectZero];
        [_okBtn setTitle:@"确定" forState:UIControlStateNormal];
        _okBtn.titleLabel.font = [UIFont systemFontOfSize:13];
        [_okBtn setTitleColor:RGBA(77, 173, 74, 1) forState:UIControlStateNormal];
        _okBtn.backgroundColor = [UIColor whiteColor];
        [_okBtn addTarget:self action:@selector(checkItem) forControlEvents:UIControlEventTouchUpInside];
        [bottomView addSubview:_okBtn];
        
        //3.2按钮
        _cancelBtn = [[UIButton alloc] initWithFrame:CGRectZero];
        [_cancelBtn setTitle:@"取消" forState:UIControlStateNormal];
        _cancelBtn.titleLabel.font = [UIFont systemFontOfSize:13];
        [_cancelBtn setTitleColor:RGBA(77, 173, 74, 1) forState:UIControlStateNormal];
        _cancelBtn.backgroundColor = [UIColor whiteColor];
        [_cancelBtn addTarget:self action:@selector(dismiss) forControlEvents:UIControlEventTouchUpInside];
        [bottomView addSubview:_cancelBtn];
        
        //0.遮盖View
        UIControl *coverView = [[UIControl alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
        coverView.backgroundColor =  [UIColor colorWithRed:.16 green:.17 blue:.21 alpha:.5];
        [coverView addTarget:self
                      action:@selector(dismiss)
            forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:coverView];
        self.coverView = coverView;

二、展示 与 消失

#pragma mark - show & dismiss

- (void)show
{
    UIWindow *keywindow = [[UIApplication sharedApplication] windows][0];
    [keywindow addSubview:self.coverView];
    [keywindow addSubview:self];
    [self.tableView reloadData];
    // 设置布局
    [self uploadLayout];
    // 渐出动画
    [self fadeIn];
}

- (void)dismiss
{
    [self fadeOut];
}

三、布局与动画

#pragma mark - uploadLayout
//获取tableview 高度
-(float)getTableViewHeight
{
    [self.tableView layoutIfNeeded];
    return self.tableView.contentSize.height;
}


-(void)uploadLayout{
    //动态高度调整
    if ([self getTableViewHeight] >= SCREEN_HEIGHT- 80) {
        CGSize winSize = [UIScreen mainScreen].bounds.size;
        self.tableView.frame = CGRectMake((winSize.width-kCenterPopupListViewWidth)/2.0f,
                                          (winSize.height - kCenterPopupListViewHeight)/2.0,
                                          kCenterPopupListViewWidth,
                                          kCenterPopupListViewHeight);
        
        
    }else{
        CGSize winSize = [UIScreen mainScreen].bounds.size;
        self.tableView.frame = CGRectMake((winSize.width-kCenterPopupListViewWidth)/2.0f,
                                          (winSize.height - [self getTableViewHeight])/2.0,
                                          kCenterPopupListViewWidth,
                                          [self getTableViewHeight]);
    }
    //标题frame
    _titleView.frame = CGRectMake(self.tableView.left, self.tableView.top-30, self.tableView.width, 30);
    //底部按钮
    self.bottomView.frame = CGRectMake(self.tableView.left, self.tableView.bottom, self.tableView.width, 44);
    
    //_titleView && 圆角
    UIBezierPath* rounded = [UIBezierPath bezierPathWithRoundedRect:_titleView.bounds byRoundingCorners:UIRectCornerTopLeft | UIRectCornerTopRight cornerRadii:CGSizeMake(20, 20)];
    CAShapeLayer* shape = [[CAShapeLayer alloc] init];
    [shape setPath:rounded.CGPath];
    _titleView.layer.mask = shape;
    _titleView.layer.masksToBounds = YES;
    
    //确定 && 取消按钮
    CGFloat cancelBtnW = 90;
    _okBtn.frame = CGRectMake(self.bottomView.width - cancelBtnW , 0, cancelBtnW, self.bottomView.height);
    _cancelBtn.frame = CGRectMake(_okBtn.left - cancelBtnW  , 0, cancelBtnW, self.bottomView.height);
    
}
#pragma mark - animations(动画)

- (void)fadeIn
{
    self.transform = CGAffineTransformMakeScale(1.3, 1.3);
    self.alpha = 0;
    [UIView animateWithDuration:.35 animations:^{
        self.alpha = 1;
        self.transform = CGAffineTransformMakeScale(1, 1);
    }];
}
- (void)fadeOut
{
    [UIView animateWithDuration:.35 animations:^{
        self.transform = CGAffineTransformMakeScale(1.3, 1.3);
        self.alpha = 0.0;
    } completion:^(BOOL finished) {
        if (finished) {
            [self.coverView removeFromSuperview];
            [self removeFromSuperview];
        }
    }];
}
#//一定要写(虽然不知道为什么,但是不写,点击事件失效)
#define mark - UITouch
-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    [self dismiss];
}
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