选中下拉框的位置变化

@interface ViewController () <UITableViewDelegate,UITableViewDataSource> {

}

@property (nonatomic,weak)UITableView *listView;

@property (nonatomic,strong)NSArray *arrays;

@property (nonatomic,strong) UILabel *label1;

@property (nonatomic,strong) UILabel *label2;

@property (nonatomic,strong)UITapGestureRecognizer *tapLabel;

@end

- (UITableView *)listView{

    

    if (!_listView) {

        

        UITableView *listView = [[UITableViewalloc]init];

        listView.delegate = self;

        listView.dataSource = self;

        listView.backgroundColor = [UIColororangeColor];

        listView.layer.borderWidth =1.0;

        listView.layer.cornerRadius =6.0;

        listView.separatorStyle =UITableViewCellSeparatorStyleNone;

        listView.layer.borderColor = [UIColorblueColor].CGColor;

        [self.viewaddSubview:listView];

        _listView = listView;

    }

    return_listView;

}

- (void)viewDidLoad {

    [superviewDidLoad];

    

    

    self.arrays =@[@"1",@"2",@"3",@"4",@"5"];

//    self.showList = NO;

    

    

    UITapGestureRecognizer *tap = [[UITapGestureRecognizeralloc]init];

    [tap addTarget:selfaction:@selector(tapGes:)];

    [self.coveraddGestureRecognizer:tap];

    

    

    UILabel *label1 = [[UILabelalloc]initWithFrame:CGRectMake(40,200,160, 20)];

    label1.layer.borderWidth =1;

    label1.layer.cornerRadius =8.0;

    label1.layer.borderColor = [[UIColororangeColor]CGColor];

    label1.userInteractionEnabled =YES;

    [self.viewaddSubview:label1];

    self.label1 = label1;

    

    self.tapLabel = [[UITapGestureRecognizeralloc]init];

    [self.tapLabeladdTarget:selfaction:@selector(tapGes:)];

    [label1 addGestureRecognizer:self.tapLabel];

    label1.tag = 1000;

    UILabel *label2 = [[UILabelalloc]initWithFrame:CGRectMake(40,500,160, 20)];

    label2.layer.borderWidth =1;

    label2.layer.cornerRadius =6.0;

    label2.layer.borderColor = [[UIColorredColor]CGColor];

    label2.userInteractionEnabled =YES;

    [self.viewaddSubview:label2];

    self.label2 = label2;

    

    self.tapLabel = [[UITapGestureRecognizeralloc]init];

    [self.tapLabeladdTarget:selfaction:@selector(tapGes:)];

    [label2 addGestureRecognizer:self.tapLabel];

    

    label2.tag = 1001;

}

- (void)tapGes:(UITapGestureRecognizer *)tap{

    

    

    self.tapLabel = tap;

    

    CGFloat height = self.arrays.count*20;

    

    CGRect rect = [tap.view.superviewconvertRect:tap.view.frametoView:self.view];

    CGFloat listX = rect.origin.x;

    CGFloat listY = CGRectGetMaxY(rect);

    CGFloat listW = rect.size.width;

    CGFloat listH = height;

    

    CGFloat vcH = self.view.frame.size.height;

    

    

    if (vcH - (listY+listH) >10) {

        

        self.listView.frame =CGRectMake(listX, listY, listW, listH);

        

    }else{

        

        self.listView.frame =CGRectMake(listX, listY-20-listH, listW, listH);

    }

    

    [self.viewaddSubview:self.listView];

    

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

    return [self.arrayscount];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    

    static NSString *listCell =@"listCell";

    

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:listCell];

    

    if (cell == nil) {

        

        cell = [[UITableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:listCell];

        

    }

    

    UIView *lineView = [[UIViewalloc]initWithFrame:CGRectMake(0,20, tableView.frame.size.width,1)];

    lineView.backgroundColor = [UIColorblueColor];

    [cell.contentView addSubview:lineView];

    

    cell.textLabel.text = [self.arraysobjectAtIndex:indexPath.row];

    

    return cell;

}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

    return 20;

    

}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    NSString *textStr = [self.arraysobjectAtIndex:indexPath.row];

    [tableView removeFromSuperview];

    

    if (self.tapLabel.view.tag ==1000) {

        

        self.label1.text = [NSStringstringWithFormat:@"  %@",textStr];

        

    }else if (self.tapLabel.view.tag ==1001){

        

        self.label2.text = [NSStringstringWithFormat:@"  %@",textStr];

    

    }else{

        

        self.textField1.text = textStr;

    }

    

}