tableView摺疊

#import <UIKit/UIKit.h>
@class CZFriendGroup;
@class CZHeaderView;

@protocol CZHeaderViewDelegate <NSObject>

@optional
- (void)headerViewDidClickedNameView:(CZHeaderView *)headerView;

@end

@interface CZHeaderView : UITableViewHeaderFooterView
@property (nonatomic, strong) CZFriendGroup *friendGroup;
@property (nonatomic, weak) id<CZHeaderViewDelegate> delegate;

+ (instancetype)headerViewWithTableView:(UITableView *)tableView;
@end

 

 

#import "CZHeaderView.h"
#import "CZFriendGroup.h"

@interface CZHeaderView ()
@property (nonatomic, weak) UIButton *nameView;
@property (nonatomic, weak) UILabel *countView;

@end

@implementation CZHeaderView
+ (instancetype)headerViewWithTableView:(UITableView *)tableView
{
    static NSString *reuseId = @"header";
    CZHeaderView *header = [tableView dequeueReusableHeaderFooterViewWithIdentifier:reuseId];
    if (header == nil) {
        header = [[self alloc] initWithReuseIdentifier:reuseId];
    }
    return header;
}

- (instancetype)initWithReuseIdentifier:(NSString *)reuseIdentifier
{
    if (self = [super initWithReuseIdentifier:reuseIdentifier]) {
        //
        UIButton *nameView = [UIButton buttonWithType:UIButtonTypeCustom];
        [self.contentView addSubview:nameView];
        self.nameView = nameView;
        [nameView setImage:[UIImage imageNamed:@"buddy_header_arrow"] forState:UIControlStateNormal];
        [nameView setBackgroundImage:[UIImage imageNamed:@"buddy_header_bg"] forState:UIControlStateNormal];
        [nameView setBackgroundImage:[UIImage imageNamed:@"buddy_header_bg_highlighted"] forState:UIControlStateHighlighted];
        [nameView setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        nameView.titleLabel.font = [UIFont systemFontOfSize:25];
        nameView.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
        nameView.contentEdgeInsets = UIEdgeInsetsMake(10, 15, 0, 0);
        nameView.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);
        
        nameView.imageView.contentMode = UIViewContentModeCenter;
        nameView.imageView.clipsToBounds = NO;
        [nameView addTarget:self action:@selector(didClickedNameView:) forControlEvents:UIControlEventTouchUpInside];
        
        UILabel *countView = [[UILabel alloc] init];
        [self.contentView addSubview:countView];
        self.countView = countView;
        countView.textAlignment = NSTextAlignmentRight;
        countView.font = [UIFont systemFontOfSize:15];
        countView.textColor = [UIColor grayColor];
    }
    return self;
}

- (void)didClickedNameView:(UIButton *)sender
{
    self.friendGroup.expend = !self.friendGroup.isExpend;
    if (self.friendGroup.isExpend) {
        self.nameView.imageView.transform = CGAffineTransformMakeRotation(M_PI_2);
    }else{
        self.nameView.imageView.transform = CGAffineTransformMakeRotation(0);
    }
    
    if ([self.delegate respondsToSelector:@selector(headerViewDidClickedNameView:)]) {
        [self.delegate headerViewDidClickedNameView:self];
    }
}

- (void)layoutSubviews
{
    [super layoutSubviews];
    
    self.nameView.frame = self.bounds;
    self.countView.frame = CGRectMake(self.bounds.size.width - 150 - 10, 0, 150, 44);
}

- (void)setFriendGroup:(CZFriendGroup *)friendGroup
{
    _friendGroup = friendGroup;
    
    [self.nameView setTitle:friendGroup.name forState:UIControlStateNormal];
    self.countView.text = [NSString stringWithFormat:@"%d/%ld",friendGroup.online,friendGroup.friends.count];
    if (self.friendGroup.isExpend) {
        self.nameView.imageView.transform = CGAffineTransformMakeRotation(M_PI_2);
    }else{
        self.nameView.imageView.transform = CGAffineTransformMakeRotation(0);
    }
}
@end

//點M文件

#import "CZFriendGroup.h"
#import "CZFriend.h"
@implementation CZFriendGroup
- (instancetype)initWithDic:(NSDictionary *)dic
{
    if (self = [super init]) {
        [self setValuesForKeysWithDictionary:dic];
    }
    return self;
}
+ (instancetype)friendGroupWithDic:(NSDictionary *)dic
{
    return [[self alloc] initWithDic:dic];
}

+ (NSArray *)friendGroupsList
{
    NSString *path = [[NSBundle mainBundle] pathForResource:@"friends" ofType:@"plist"];
    NSArray *dicArray = [NSArray arrayWithContentsOfFile:path];
    NSMutableArray *friendGroups = [NSMutableArray array];
    for (NSDictionary *dic in dicArray) {
        CZFriendGroup *friendGroup = [[CZFriendGroup alloc] initWithDic:dic];
        
        NSMutableArray *tmpArray = [NSMutableArray array];
        for (NSDictionary *friendDic in friendGroup.friends) {
            CZFriend *friend = [CZFriend friendWithDic:friendDic];
            [tmpArray addObject:friend];
        }
        friendGroup.friends = tmpArray;
        
        [friendGroups addObject:friendGroup];
        
    }
    return friendGroups;
}
@end

 

#import "ViewController.h"
#import "CZFriend.h"
#import "CZFriendGroup.h"
#import "CZHeaderView.h"
@interface ViewController () <CZHeaderViewDelegate>
@property (nonatomic, strong) NSArray *friendGroups;
@end

@implementation ViewController

- (BOOL)prefersStatusBarHidden
{
    return YES;
}

// 懶加載
- (NSArray *)friendGroups
{
    if (_friendGroups == nil) {
        _friendGroups = [CZFriendGroup friendGroupsList];
    }
    return _friendGroups;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.tableView.sectionHeaderHeight = 44;
}

#pragma mark - 數據源方法
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return self.friendGroups.count;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    CZFriendGroup *group = self.friendGroups[section];
    return  group.isExpend ? group.friends.count : 0;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    //1
    static NSString *reuseId = @"friend";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseId];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:reuseId];
    }
    
    
    //2
    CZFriendGroup *group = self.friendGroups[indexPath.section];
    CZFriend *friend = group.friends[indexPath.row];
    
    cell.textLabel.text = friend.name;
    cell.detailTextLabel.text = friend.intro;
    cell.imageView.image = [UIImage imageNamed:friend.icon];
    
    
    cell.textLabel.textColor = friend.isVip ? [UIColor redColor]:[UIColor blackColor];
    
    return cell;
}
#pragma mark - 代理的方法
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
    
    //1
    CZHeaderView *headerView = [CZHeaderView headerViewWithTableView:tableView];
    headerView.delegate = self;
    headerView.tag = section;
    //2
    CZFriendGroup *group = self.friendGroups[section];
    headerView.friendGroup = group;
    //3
    return headerView;
}

#pragma mark - headerView的代理方法
- (void)headerViewDidClickedNameView:(CZHeaderView *)headerView
{
//    [self.tableView reloadData];
    NSIndexSet *indexSet = [NSIndexSet indexSetWithIndex:headerView.tag];

    
    [self.tableView reloadSections:indexSet withRowAnimation:UITableViewRowAnimationAutomatic];
}


@end