UITableView multiple options: Select All and uitableview multiple options

UITableView multiple options: Select All and uitableview multiple options

You just need to customize the cell and obtain the corresponding cell.

TableViewCell. h

#import <UIKit/UIKit.h>@interface TableViewCell : UITableViewCell {    BOOL _checked;    UIImageView *_checkedImage;}- (void)setChecked:(BOOL)checked;@end

TableViewCell. m

#import "TableViewCell.h"@implementation TableViewCell- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];    if (self) {        _checkedImage = [[UIImageView alloc]init];        _checkedImage.image = [UIImage imageNamed:@"Unselected"];        [self.contentView addSubview:_checkedImage];    }    return self;}- (void)layoutSubviews {    [super layoutSubviews];    _checkedImage.frame = CGRectMake(10, 10, 29, 29);}- (void)setChecked:(BOOL)checked {    if (checked) {        _checkedImage.image = [UIImage imageNamed:@"Selected"];    }else {        _checkedImage.image = [UIImage imageNamed:@"Unselected"];    }
　　_checked = checked;}- (void)awakeFromNib {    // Initialization code}- (void)setSelected:(BOOL)selected animated:(BOOL)animated {    [super setSelected:selected animated:animated];    // Configure the view for the selected state}@end

ViewController. m

# Import "ViewController. h "# import" TableViewCell. h "@ interface ViewController () <UITableViewDataSource, UITableViewDelegate> {UITableView * _ tableView;} @ property (nonatomic, strong) NSMutableArray * array; @ property (nonatomic, strong) NSMutableArray * checkedArray; @ end @ implementation ViewController-(void) viewDidLoad {[super viewDidLoad]; [self initDataSource]; self. view. backgroundColor = [UIColor lightGr AyColor]; _ tableView = [[UITableView alloc] initWithFrame: CGRectMake (0,100, CGRectGetWidth (self. view. bounds), CGRectGetHeight (self. view. bounds)]; _ tableView. dataSource = self; _ tableView. delegate = self; [self. view addSubview: _ tableView]; UIButton * button = [UIButton buttonWithType: UIButtonTypeSystem]; [button setTitle: @ "select all" forState: UIControlStateNormal]; [button setTitle: @ "cancel" forState: UIContro LStateSelected]; button. frame = CGRectMake (10, 10,100, 50); [button addTarget: self action: @ selector (buttonPressed :) forControlEvents: UIControlEventTouchUpInside]; [self. view addSubview: button];}-(void) initDataSource {_ checkedArray = [NSMutableArray array]; for (int I = 0; I <self. array. count; I ++) {NSMutableDictionary * dic = [NSMutableDictionary dictionary]; [dic setValue: @ "NO" forKey: @ "che Cked "]; [_ checkedArray addObject: dic] ;}# pragma mark-lazy loading-(NSMutableArray *) array {if (! _ Array) {_ array = [[NSMutableArray alloc] initWithObjects: @ "1", @ "2", @ "3", @ "4", @ "5 ", nil];} return _ array;} # pragma mark-event listening-(void) buttonPressed :( UIButton *) sender {sender. selected =! Sender. selected; NSArray * anArrayOfIndexPath = [NSArray arrayWithArray: [_ tableView indexPathsForVisibleRows]; for (int I = 0; I <[anArrayOfIndexPath count]; I ++) {NSIndexPath * indexPath = [anArrayOfIndexPath objectAtIndex: I]; // obtain the corresponding cell TableViewCell * cell = (TableViewCell *) [_ tableView cellForRowAtIndexPath: indexPath]; NSUInteger row = [indexPath row]; NSMutableDictionary * dic = [_ checkedArray o BjectAtIndex: row]; if (sender. selected) {[dic setObject: @ "YES" forKey: @ "checked"]; [cell setChecked: YES];} else {[dic setObject: @ "NO" forKey: @ "checked"]; [cell setChecked: NO] ;}}# pragma mark-<UITableViewDataSource, UITableViewDelegate>-(NSInteger) numberOfSectionsInTableView :( UITableView *) tableView {return 1 ;} -(NSInteger) tableView :( UITableView *) tableView numberOfRowsInSection :( NSInteger) s Ection {return self. array. count;}-(UITableViewCell *) tableView :( UITableView *) tableView cellForRowAtIndexPath :( NSIndexPath *) indexPath {static NSString * cellID = @ "cellID"; TableViewCell * cell = [tableView progress: cellID]; if (! Cell) {cell = [[TableViewCell alloc] initWithStyle: UITableViewCellStyleDefault reuseIdentifier: cellID];} NSUInteger row = indexPath. row; [self cellChecked: cell row: row isSelected: NO]; return cell;}-(void) tableView :( UITableView *) tableView didSelectRowAtIndexPath :( NSIndexPath *) indexPath {[tableView deselectRowAtIndexPath: indexPath animated: YES]; TableViewCell * cell = (TableViewCell *) [tableView ce LlForRowAtIndexPath: indexPath]; NSUInteger row = indexPath. row; [self cellChecked: cell row: row isSelected: YES] ;}# pragma mark-others/*** click to determine when the cell is loaded, to change the cell selection status ** @ param cell custom cell * @ param row tableView subscript * @ param isSelected whether to click */-(void) cellChecked :( TableViewCell *) cell row :( NSUInteger) row isSelected :( BOOL) isSelected {NSMutableDictionary * dic = [_ checkedArray objectAtIndex: row ]; If ([[dic objectForKey: @ "checked"] isEqualToString: @ "NO"]) {if (isSelected) {[dic setObject: @ "YES" forKey: @ "checked"]; [cell setChecked: YES];} else {[dic setObject: @ "NO" forKey: @ "checked"]; [cell setChecked: NO] ;}} else {if (! IsSelected) {[dic setObject: @ "YES" forKey: @ "checked"]; [cell setChecked: YES];} else {[dic setObject: @ "NO" forKey: @ "checked"]; [cell setChecked: NO] ;}}

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