IOS UITableView dynamically hides or displays Item and iosuitableview

IOS UITableView dynamically hides or displays Item and iosuitableview

Hide and display items by changing the height of items to be hidden

 

1. Create UITableView

#import "ViewController.h"@interface ViewController ()@property(nonatomic, strong)UITableView *tableView;@property(nonatomic, assign)BOOL isHiddenItem;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    self.isHiddenItem = NO;    self.tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];    self.tableView.delegate = self;    self.tableView.dataSource = self;    [self.view addSubview:self.tableView];}

 

2. UITableView delegate. The specific implementation methods have been annotated.

-(CGFloat) tableView :( UITableView *) tableView heightForRowAtIndexPath :( NSIndexPath *) indexPath {// set the height of the item to be hidden to 0 if (indexPath. row = 2 & self. isHiddenItem) {return 0;} return 100;}-(NSInteger) tableView :( UITableView *) tableView numberOfRowsInSection :( NSInteger) section {return 5;}-(UITableViewCell *) tableView :( UITableView *) tableView cellForRowAtIndexPath :( NSIndexPath *) indexPath {UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier: @ "cell"]; if (cell = nil) {cell = [[UITableViewCell alloc] initWithStyle: UITableViewCellStyleDefault reuseIdentifier: @ "cell"];} if (indexPath. row = 0) {cell. textLabel. text = @ "Hide 2nd rows when you click 0";} else if (indexPath. row = 1) {cell. textLabel. text = @ "2nd rows are displayed when one row is clicked";} else {cell. textLabel. text = [NSString stringWithFormat: @ "current row % ld", indexPath. row];} return cell;}-(void) tableView :( UITableView *) tableView didSelectRowAtIndexPath :( NSIndexPath *) indexPath {if (indexPath. row = 0) {// indicates whether self is hidden. isHiddenItem = YES; // obtain the NSIndexPath * tmpPath = [NSIndexPath indexPathForRow: indexPath. row + 2 inSection: indexPath. section]; [UIView animateWithDuration: 0.3 animations: ^ {[self. tableView cellForRowAtIndexPath: tmpPath]. alpha = 0.0f;} completion: ^ (BOOL finished) {// hide the corresponding item [[self. tableView cellForRowAtIndexPath: tmpPath] setHidden: YES]; // refresh the hidden item [self. tableView reloadRowsAtIndexPaths: [NSArray arrayWithObject: tmpPath] withRowAnimation: UITableViewRowAnimationFade];}]; NSLog (@ "0th rows clicked");} else if (indexPath. row = 1) {self. isHiddenItem = NO; NSIndexPath * tmpPath = [NSIndexPath indexPathForRow: indexPath. row + 2 inSection: indexPath. section]; [UIView animateWithDuration: 0.3 animations: ^ {[self. tableView cellForRowAtIndexPath: tmpPath]. alpha = 1.0f;} completion: ^ (BOOL finished) {[self. tableView cellForRowAtIndexPath: tmpPath] setHidden: YES]; [self. tableView reloadRowsAtIndexPaths: [NSArray arrayWithObject: tmpPath] withRowAnimation: UITableViewRowAnimationFade];}]; NSLog (@ "1st rows clicked ");}}

 

3. Results

 

If you did not see this article in wb145230, click to view the original article.