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本文实例为大家分享了ios实现列表折叠效果的具体代码，供大家参考，具体内容如下
实现列表折叠效果其实比较简单，点击列表头部的时候，把返回列表行数设为 0，就是收起列表；再次点击列表头部，显示列表的行数，就展开了列表。
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#import "tabledownupvc.h"
#import "tableviewcell_tableselect.h"
@interface tabledownupvc ()
{
nsmutabledictionary *dicselet;
nsarray *arrdata;
nsmutablearray *arrstatus;
nsinteger selectflag;
nsmutabledictionary *dictshow;
}
@property (nonatomic, strong) uiimageview *imgarror;
@end
@implementation tabledownupvc
- (void)viewdidload {
[super viewdidload];
self.tableview.autoresizingmask = uiviewautoresizingflexibleheight;
self.title = @"列表折叠效果";
dictshow = [[nsmutabledictionary alloc] init];
arrstatus = [[nsmutablearray alloc] init];
nsdictionary *dict0 = @{@"section":@"头部0",
@"content":@[@{@"title":@"section0",@"subtitle":@"row0",@"avator":@"user_default_blue"},
@{@"title":@"section0",@"subtitle":@"row1",@"avator":@"user_default_blue"},
@{@"title":@"section0",@"subtitle":@"row2",@"avator":@"user_default_blue"}]};
nsdictionary *dict1 = @{@"section":@"头部1",
@"content":@[@{@"title":@"section1",@"subtitle":@"row0",@"avator":@"user_default_blue"},
@{@"title":@"section1",@"subtitle":@"row1",@"avator":@"user_default_blue"},
@{@"title":@"section1",@"subtitle":@"row2",@"avator":@"user_default_blue"}]};
nsdictionary *dict2 = @{@"section":@"头部2",
@"content":@[@{@"title":@"section2",@"subtitle":@"row0",@"avator":@"user_default_blue"},
@{@"title":@"section2",@"subtitle":@"row1",@"avator":@"user_default_blue"},
@{@"title":@"section2",@"subtitle":@"row2",@"avator":@"user_default_blue"}]};
arrdata = @[dict0,dict1,dict2];
dicselet = [[nsmutabledictionary alloc] init];
//初始化选中状态(默认都不选择)
for (nsinteger i=0; i<arrdata.count; i++) {
nsarray *content = arrdata[i][@"content"];
nsmutabledictionary *dict = [[nsmutabledictionary alloc] init];
for (nsinteger j=0; j<content.count; j++) {
[dict setobject:@"0" forkey:str_num(j)];
}
[arrstatus addobject:dict];
}
//初始化列表头部折叠状态
for (nsinteger i=0; i<arrdata.count; i++) {
[dictshow setobject:@"0" forkey:str_num(i)];
}
}
#pragma mark - tableviewdatasource,uitableviewdelegate 扩展
- (nsinteger)numberofsectionsintableview:(uitableview *)tableview
{
return arrdata.count;
}
- (nsinteger)tableviewex:(uitableview *)tableview numberofrowsinsection:(nsinteger)section
{
nsstring *isshow = dictshow[str_num(section)];
if ([isshow isequaltostring:@"0"]) {
nsarray *arr = arrdata[section][@"content"];
return arr.count;
} else {
return 0;
}
}
- (cgfloat)tableviewex:(uitableview *)tableview heightforrowatindexpath:(nsindexpath *)indexpath
{
return 60;
}
- (uitableviewcell *)tableviewex:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath
{
static nsstring * identifier = @"cellidentifier";
tableviewcell_tableselect *cell = [tableview dequeuereusablecellwithidentifier:identifier];
cell.selectionstyle = uitableviewcellselectionstylenone;
if (cell == nil) {
cell = [[tableviewcell_tableselect alloc]initwithstyle:uitableviewcellstylesubtitle reuseidentifier:identifier];
}
[cell setdictinfo:arrdata[indexpath.section][@"content"][indexpath.row]];
[cell setaccessoryimage:arrstatus[indexpath.section][str_num(indexpath.row)]];
return cell;
}
- (void)tableviewex:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath
{
nsmutabledictionary *dict = arrstatus[indexpath.section];
nsstring *str = dict[str_num(indexpath.row)];
if ([str isequaltostring:@"0"]) {
[dict setvalue:@"1" forkey:str_num(indexpath.row)];
} else {
[dict setvalue:@"0" forkey:str_num(indexpath.row)];
}
[self.tableview reloaddata];
}
- (cgfloat)tableview:(uitableview *)tableview heightforheaderinsection:(nsinteger)section
{
return 50;
}
- (cgfloat)tableview:(uitableview *)tableview heightforfooterinsection:(nsinteger)section
{
return 10;
}
- (uiview *)tableview:(uitableview *)tableview viewforheaderinsection:(nsinteger)section
{
uiview *headerview = [uicommonctrl commonviewwithframe:cgrectmake(0, 0, screen_width, 50) color:kcolor_white];
uilabel *title = [uicommonctrl commonlabelwithframe:cgrectmake(10, 15, 200, 20)
text:arrdata[section][@"section"]
color:kcolor_black
font:kfont_large
textalignment:nstextalignmentleft];
[headerview addsubview:title];
_imgarror = [uicommonctrl commonimageviewwithframe:cgrectmake(screen_width-20, 22.5, 10, 5) image:nil];
[headerview addsubview:_imgarror];
nsstring *str = [dictshow objectforkey:str_num(section)];
if ([str isequaltostring:@"0"]) {
_imgarror.image = [uiimage imagenamed:@"icon_down"];
} else {
_imgarror.image = [uiimage imagenamed:@"icon_up"];
}
@weakify(self)
uibutton *btn = [uicommonctrl commonbuttonwithframe:cgrectmake(0, 0, screen_width, 50)
text:@""
color:kcolor_black
font:kfont_large
backgroundimage:nil
block:^(uibutton *btn) {
@strongify(self)
nsstring *str = [dictshow objectforkey:str_num(section)];
if ([str isequaltostring:@"0"]) {
[dictshow setvalue:@"1" forkey:str_num(section)];
} else {
[dictshow setvalue:@"0" forkey:str_num(section)];
}
[self refreshsection:section];
}];
[headerview addsubview:btn];
for (nsinteger i=0; i<2; i++) {
uiview *line = [uicommonctrl commonlineviewwithframe:cgrectmake(0, (50-line_size)*i, screen_width, line_size) color:kcolor_line];
[headerview addsubview:line];
}
return headerview;
}
- (uiview *)tableview:(uitableview *)tableview viewforfooterinsection:(nsinteger)section
{
uiview *footerview = [uicommonctrl commonviewwithframe:cgrectmake(0, 0, screen_width, 10) color:kcolor_background];
return footerview;
}
- (void)refreshsection:(nsinteger)section
{
nsindexset *indexset=[[nsindexset alloc]initwithindex:section];
[self.tableview reloadsections:indexset withrowanimation:uitableviewrowanimationfade];
}
@end
效果图
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