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
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/u010545480/article/details/52449469
