二级菜单设计
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2022-06-01 18:14:30
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二级菜单设计
#import "ViewController.h"
@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>
{
NSInteger arrayOf;//数组第几个
NSMutableArray * NumberOneArray;//装载1的数组
}
@property(nonatomic, strong)UITableView *tableView;
@property(nonatomic, strong)NSMutableArray *sectionArray;//section标题
@property(nonatomic, strong)NSMutableArray *rowInSectionArray;//section中的cell个数
@property(nonatomic, strong)NSMutableArray *selectedArray;//是否被点击
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
_tableView = [[UITableView alloc]initWithFrame:CGRectMake(0 ,20 , self.view.frame.size.width, self.view.frame.size.height)style:UITableViewStylePlain];
_tableView.tableFooterView = [[UIView alloc]init];
_tableView.delegate = self;
_tableView.dataSource = self;
[self.view addSubview:_tableView];
_sectionArray = [NSMutableArray arrayWithObjects:@"标题1",@"标题2",@"标题3",@"标题4", nil];//每个分区的标题
_rowInSectionArray = [NSMutableArray arrayWithObjects:@"4",@"2",@"5",@"6", nil];//每个分区中cell的个数
_selectedArray = [NSMutableArray arrayWithObjects:@"0",@"0",@"0",@"0", nil];//这个用于判断展开还是缩回当前section的cell
// Do any additional setup after loading the view, typically from a nib.
}
#pragma mark cell的内容
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *identifier = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (!cell) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
}
cell.backgroundColor=[UIColor lightGrayColor];
cell.textLabel.text = _sectionArray[indexPath.section];
return cell;
}
#pragma mark cell的行数
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
//判断section的标记是否为1,如果是说明为展开,就返回真实个数,如果不是就说明是缩回,返回0.
if ([_selectedArray[section] isEqualToString:@"1"]) {
return [_rowInSectionArray[section]integerValue];
}
return 0;
}
#pragma mark section的个数
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return _sectionArray.count;
}
#pragma cell的高度
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
return 50;
}
#pragma mark - section内容
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
//每个section上面有一个button,给button一个tag值,用于在点击事件中改变_selectedArray[button.tag - 1000]的值
UIView *sectionView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 50)];
sectionView.backgroundColor = [UIColor whiteColor];
UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(20, 0, sectionView.frame.size.width, 50)];
label.text=[_sectionArray objectAtIndex:section];
label.tag=section+100;
label.textColor=[UIColor lightGrayColor];
label.font=[UIFont systemFontOfSize:20];
[sectionView addSubview:label];
UIView *lineView=[[UIView alloc]initWithFrame:CGRectMake(0, 49, sectionView.frame.size.width, 1)];
lineView.backgroundColor=[UIColor groupTableViewBackgroundColor];
[sectionView addSubview:lineView];
UIImageView *imageView=[[UIImageView alloc]initWithFrame:CGRectMake(sectionView.frame.size.width-40, 15, 10, 20)];
imageView.image=[UIImage imageNamed:@"arrow"];
imageView.tag=section+10000;
[sectionView addSubview:imageView];
UIButton *sectionButton = [UIButton buttonWithType:UIButtonTypeCustom];
sectionButton.frame = sectionView.frame;
[sectionButton addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
sectionButton.tag = 1000 + section;
[sectionView addSubview:sectionButton];
return sectionView;
}
//cell文本缩进
-(NSInteger)tableView:(UITableView *)tableView indentationLevelForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 1;
}
#pragma mark button点击方法
-(void)buttonAction:(UIButton *)button
{
//判断展开的样式为第几个
arrayOf = [_selectedArray indexOfObject:@"1"];
NumberOneArray = [[NSMutableArray alloc]init];
//如果有1的样式就装到数组里
for (NSString * str in _selectedArray) {
if ([str isEqualToString:@"1"]) {
[NumberOneArray addObject:str];
}
}
//如果展开的位置与button的tag值不相等，并且数组里有1。走以下方法，点开其它列表时关闭别的展开列表
if (button.tag-1000 != arrayOf && NumberOneArray.count != 0) {
if ([_selectedArray[arrayOf] isEqualToString:@"0"]) {
//如果当前点击的section是缩回的,那么点击后就需要把它展开,是_selectedArray对应的值为1,这样当前section返回cell的个数就变为真实个数,然后刷新这个section就行了
[_selectedArray replaceObjectAtIndex:arrayOf withObject:@"1"];
[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:arrayOf] withRowAnimation:UITableViewRowAnimationAutomatic];
// [_tableView reloadData];
}
else
{
//如果当前点击的section是展开的,那么点击后就需要把它缩回,使_selectedArray对应的值为0,这样当前section返回cell的个数变成0,然后刷新这个section就行了
[_selectedArray replaceObjectAtIndex:arrayOf withObject:@"0"];
[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:arrayOf] withRowAnimation:UITableViewRowAnimationAutomatic];
// [_tableView reloadData];
}
}
//当点击自己时可触发自己展开收回的方法
if ([_selectedArray[button.tag - 1000] isEqualToString:@"0"]) {
//如果当前点击的section是缩回的,那么点击后就需要把它展开,是_selectedArray对应的值为1,这样当前section返回cell的个数就变为真实个数,然后刷新这个
[_selectedArray replaceObjectAtIndex:button.tag - 1000 withObject:@"1"];
[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:button.tag - 1000] withRowAnimation:UITableViewRowAnimationAutomatic];
// [_tableView reloadData];
UILabel *label=[self.tableView viewWithTag:(button.tag-1000)+100];
label.textColor=[UIColor redColor];
UIImageView *imageView=[self.tableView viewWithTag:(button.tag-1000)+10000];
imageView.frame=CGRectMake(self.view.frame.size.width-45, 20, 20, 10);
imageView.image=[UIImage imageNamed:@"choice_clicked"];
}
else
{
//如果当前点击的section是展开的,那么点击后就需要把它缩回,使_selectedArray对应的值为0,这样当前section返回cell的个数变成0,然后刷新这个section就行了
[_selectedArray replaceObjectAtIndex:button.tag - 1000 withObject:@"0"];
[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:button.tag - 1000] withRowAnimation:UITableViewRowAnimationAutomatic];
UILabel *label=[self.tableView viewWithTag:(button.tag-1000)+100];
label.textColor=[UIColor lightGrayColor];
UIImageView *imageView=[self.tableView viewWithTag:(button.tag-1000)+10000];
imageView.frame=CGRectMake(self.view.frame.size.width-40, 15, 10, 20);
imageView.image=[UIImage imageNamed:@"arrow"];
// [_tableView reloadData];
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end