I have added a UIRefreshControl to my collection view:
self.refreshControl = [[UIRefreshControl alloc]init];
[self.refreshControl addTarget:self action:#selector(refreshCV:) forControlEvents:UIControlEventValueChanged];
[self.collectionView addSubview:self.refreshControl];
- (void)refreshCV:(UIRefreshControl *)refresh{
NSLog(#"Refresh");
[refresh endRefreshing];
}
But it is not working always. In other words, sometimes when pulling down it is doesn't call the refresh function. How to solve this?
Try this answer.
You have to set alwaysBounceVertical property of collection view.
If you are not using UITableViewController class, then do as below
UITableViewController *tableViewController = [[UITableViewController alloc] init];
tableViewController.tableView = self.myTableView;
self.refreshControl = [[UIRefreshControl alloc] init];
[self.refreshControl addTarget:self action:#selector(refreshTV:) forControlEvents:UIControlEventValueChanged];
tableViewController.refreshControl = self.refreshControl;
- (void)refreshTV:(UIRefreshControl *)refresh{
NSLog(#"Refresh");
[refresh endRefreshing];
}
You add refreshCV as the target function for refresh control while you actually have refreshTV below. Please check to make sure which function you want indeed.
Here is an example of a UIRefreshControl.
UIRefreshControl *control = [[UIRefreshControl alloc] initWithFrame:CGRectZero];
control.tintColor = someColor;
[control sizeToFit];
[tableView addSubview:control];
#pragma mark UIRefreshControl
- (void) setUpRefreshControl {
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refreshControl addTarget:self action:#selector(refresh:) forControlEvents:UIControlEventValueChanged];
//add UIRefreshControl to Collection view
[self.collectionView addSubview:refreshControl];
}
- (void)refresh:(id)sender
{
UIRefreshControl *refreshControl = (UIRefreshControl *)sender;
// End the refreshing
if (refreshControl) {
[refreshControl endRefreshing];
}
}
Related
My UIRefreshControl is stuck after switching tabs, It happenes only on the first tab. Inside TabBar I have 2 tabs with UIViewControler inside which I have UITableView.
I have tried all solutions suggested HERE and none worked for me.
Below is what I am am doing.
- (void)viewDidLoad {
[super viewDidLoad];
data = [[NSMutableArray alloc] initWithArray:[[DataCache sharedCache] getData]];
[self addNavBar];
[self addDataTable];
//for refreshing the table data
UITableViewController *tableViewController = [[UITableViewController alloc] init];
tableViewController.tableView = dataTable;
refreshControl = [[UIRefreshControl alloc] init];
refreshControl.backgroundColor = [UIColor purpleColor];
refreshControl.tintColor = [UIColor whiteColor];
[refreshControl addTarget:self
action:#selector(refresh)
forControlEvents:UIControlEventValueChanged];
[dataTable addSubview:refreshControl];
tableViewController.refreshControl = refreshControl;
}
- (void)refresh {
[self loadSentData];
data = [[NSMutableArray alloc] initWithArray:[[DataCache sharedCache] getSentData]];
[self performSelectorOnMainThread:#selector(reloadData) withObject:nil waitUntilDone:NO];
}
- (void)reloadData{
[dataTable reloadData];
[refreshControl endRefreshing];
}
Since this question has been viewed hundreds of time. Adding my solution here might help someone else.
In my case, it was due to refreshControl. you need separate refreshControl for both the views. I ended up creating refreshControlFirstView and refreshControlSecondView and that resolved the issues.
I have used UIDatePicker on the UITextField. I have press UITextField to select the date using datepicker 1st time(App working correct), 2nd Time when I have press again on UITextField to select the new date set on UITextField using UIDatePicker then application is crashes.
I am not using UITableView, I am using simple view that's viewController.
Please Help me...
Thanks
- (void)viewDidLoad
{
[super viewDidLoad];
form=[[NSDateFormatter alloc]init];
[form setDateFormat:#"MM-dd-yyyy"];
datePicker=[[UIDatePicker alloc]init];//Date picker
datePicker.frame=CGRectMake(0,0,320, 216);
datePicker.backgroundColor = [UIColor whiteColor];
}
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
BOOL a;
if (textField.tag==10) {
UIViewController* popoverContent = [[UIViewController alloc] init]; //ViewController
UIView *popoverView = [[UIView alloc] init]; //view
popoverView.backgroundColor = [UIColor blackColor];
datePicker.datePickerMode = UIDatePickerModeDate;
[datePicker setMinuteInterval:5];
[datePicker setTag:10];
[datePicker addTarget:self action:#selector(Result) forControlEvents:UIControlEventValueChanged];
[popoverView addSubview:datePicker];
popoverContent.view = popoverView;
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:popoverContent];
navigationController.delegate=self;
popoverController = [[UIPopoverController alloc]
initWithContentViewController:navigationController];
popoverController.delegate=self;
[popoverController setPopoverContentSize:CGSizeMake(320, 250) animated:NO];
[popoverController presentPopoverFromRect:textField.frame inView:self.addView permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
a=NO;
}
else
{
a=YES;
}
return a;
}
-(void)Result
{
NSDateFormatter *formDay = [[NSDateFormatter alloc] init];
formDay.dateFormat=#"MM-dd-yyyy";
NSString *day = [formDay stringFromDate:[datePicker date]];
self.edit_dob.text = day;
}
Error
*** Assertion failure in -[UIPickerTableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:], /SourceCache/UIKit/UIKit-3318.16.14/UITableView.m:9269
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView dataSource is not set'
I have share a screenshot. I have select date first time successfully and when I have press to reset new date on that textfield that time app crash.
datePicker.datePickerMode = UIDatePickerModeDate;
[datePicker setMinuteInterval:5];
[datePicker setTag:10];
[datePicker addTarget:self action:#selector(Result) forControlEvents:UIControlEventValueChanged];
[popoverView addSubview:datePicker];
You are repeating these operations every time the textfield is focused. This practice is plain wrong, and is a potential cause of various unexpected behavior like the one you encountered. The fact that it works for the first time makes me think that one of these unnecessarily repeated actions is the culprit. (I'd bet on the addTarget:forControlEvents: method call. This should never be done in any case. I don't even know what happens when you try to add the same target again.)
You should structure your code better to make these method calls only once, instead of multiple times like in the code you've shown (e.g. in viewDidLoad instead of textFieldShouldBeginEditing:) and most probably, the error will go away.
You need to retain the datepicker object i.e.:
#property(nonatomic,strong) UIDatePicker *datePicker;
in the .h file.
Here is updated code:
- (void)viewDidLoad
{
[super viewDidLoad];
form=[[NSDateFormatter alloc]init];
[form setDateFormat:#"MM-dd-yyyy"];
_datePicker=[[UIDatePicker alloc]init];//Date picker
_datePicker.frame=CGRectMake(0,0,320, 216);
_datePicker.backgroundColor = [UIColor whiteColor];
_datePicker.datePickerMode = UIDatePickerModeDate;
[_datePicker setMinuteInterval:5];
[_datePicker setTag:10];
[_datePicker addTarget:self action:#selector(Result) forControlEvents:UIControlEventValueChanged];
}
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
BOOL a;
if (textField.tag==10) {
UIViewController* popoverContent = [[UIViewController alloc] init]; //ViewController
UIView *popoverView = [[UIView alloc] init]; //view
popoverView.backgroundColor = [UIColor blackColor];
[popoverView addSubview:_datePicker];
popoverContent.view = popoverView;
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:popoverContent];
navigationController.delegate=self;
UIPopoverController *popoverController = [[UIPopoverController alloc]
initWithContentViewController:navigationController];
popoverController.delegate=self;
[popoverController setPopoverContentSize:CGSizeMake(320, 250) animated:NO];
[popoverController presentPopoverFromRect:textField.frame inView:textField permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
a=NO;
}
else
{
a=YES;
}
return a;
}
-(void)Result
{
NSDateFormatter *formDay = [[NSDateFormatter alloc] init];
formDay.dateFormat=#"MM-dd-yyyy";
NSString *day = [formDay stringFromDate:[_datePicker date]];
_edit_dob.text = day;
}
When I add a UIPopoverController in the ViewDidLoad method, it displays an empty popover view. The same thing happens when I add a UITapGestureRecognizer; it doesn't trigger the attached method. If I put the code in my ViewDidAppear it does work, but in some cases ViewDidAppear is never called, depending on where in my storyboard the view is loaded.
Here's my code:
UIViewController* popoverContent = [[UIViewController alloc] init];
UIView *popoverView = [[UIView alloc] init];
popoverView.backgroundColor = [UIColor whiteColor];
popoverContent.view = popoverView;
pickerPopup = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
pickerPopup.delegate = (id)self;
[pickerPopup setPopoverContentSize:CGSizeMake(320, 240) animated:NO];
And the UITapGestureRecognizer:
tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(openPicker:)];
[_form_from addGestureRecognizer:tap];
I solved it for now using a delay in the ViewDidLoad method like so
[self performSelector:#selector(custom_init) withObject:nil afterDelay:0.1];
Still don't get why the UITapGestureRecognizer doesn't trigger. It does work if I attach it to the view, but not if I attach it to a textfield in a static cell.
I need to make my every single UIImageView to be single tapped.
I have a viewController, on this view controller there is a view which i push another views on this view with containment.
I am trying to create gallery ,
What might I be doing wrong?
This is my code;
-(id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Custom initialization
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(openPhotoDetail)];
[self addGestureRecognizer:singleTap];
[self setBackgroundColor:[UIColor lightGrayColor]];
}
return self;
}
-(void)openPhotoDetail
{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"SideMenu" bundle:[NSBundle mainBundle]];
PhotoDetailViewController *photoDetailViewController = [storyboard instantiateViewControllerWithIdentifier:#"photoDetailViewController"];
AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
[appDelegate.window.rootViewController.menuContainerViewController.centerViewController pushViewController:photoDetailViewController animated:YES];
}
Initially a UIImageView has user interaction disabled. Enalbe the user interaction of your UIImageView and it should work.
imageView.userInteractionEnabled = YES;
In Viewdidload set
YourImageView.userInteractionEnabled = YES;
UITapGestureRecognizer * singleTap =
[[UITapGestureRecognizer alloc] initWithTarget:self
action:#selector(openPhotoDetail:)];
// Instead of self ,give your imageView to add gesture event
[YourImageView addGestureRecognizer: singleTap];
Click on the UIImageView, on storyboard,
Go to Attributes Inspector (The button that looks like a tuxedo, top right ,Second button).
Check the attribute "User Interaction Enabled"
Or if you want to do it by code,
in
-(void)viewDidLoad {
myImageView1.userInteractionEnabled = YES;
myImageView2.userInteractionEnabled = YES;
myImageView3.userInteractionEnabled = YES;
}
UIImageView *MyImageview = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"XYZ.png"]];
UITapGestureRecognizer *TapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(openPhotoDetail)];
[MyImageview addGestureRecognizer:TapGesture];
[MyImageview setUserInteractionEnabled:YES];
Can u use it like that
I have a UIViewController that has a UITableView as a subView. I am trying to add a pull-to-refresh on the table.
I have the UIRefresh showing but it never calls the selector. I am not getting notified that the pull action happened.
I cannot use the TableView controller as i am using this View as my Generic View So that i can use for multiple View controllers
- (void)viewDidLoad{
[super viewDidLoad];
// Refresh control
UITableViewController *tableViewController = [[UITableViewController alloc] initWithStyle:UITableViewStylePlain];
tableViewController.tableView = self.genericMainTableView;
// Initialise refresh control
self.refreshControl = [[UIRefreshControl alloc] init];
//Adding target to refresh Control object
[self.refreshControl addTarget:self action:#selector(refresh:) forControlEvents:UIControlEventValueChanged];
//Setting attribute Title
self.refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:#"Pull To Refresh"];
//Adding as subview to tableView
tableViewController.refreshControl = self.refreshControl;
}
- (void)refresh:(UIRefreshControl *)refreshControl {
reachability = [Reachability reachabilityForInternetConnection];
NetworkStatus netStatus = [reachability currentReachabilityStatus];
//Not Reachable - No Internet Connection
if (netStatus == NotReachable) {
[[[UIAlertView alloc]initWithTitle:#"Network Error" message:#"Please Check your Network Connection" delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil]show];
[refreshControl endRefreshing];
}
else{
//My Function Call
[self functionCall];
//Reload the Table
[self.genericMainTableView reloadData];
//set the title while refreshing
refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:#"Refreshing the TableView"];
//set the date and time of refreshing
NSDateFormatter *formattedDate = [[NSDateFormatter alloc]init];
[formattedDate setDateFormat:#"MMM d, h:mm a"];
NSString *lastupdated = [NSString stringWithFormat:#"Last Updated on %#",[formattedDate stringFromDate:[NSDate date]]];
refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:lastupdated];
//End Refreshing
[refreshControl endRefreshing];
}
}
Am I doing everything right here. Its not working for me. Please Help me in this.
The problem is in your viewDidLoad. No need to instantiate UITableViewController for refresh control. Just change viewDidLoad to this
- (void)viewDidLoad{
[super viewDidLoad];
// Initialise refresh control
self.refreshControl = [[UIRefreshControl alloc] init];
//Adding target to refresh Control object
[self.refreshControl addTarget:self action:#selector(refresh:) forControlEvents:UIControlEventValueChanged];
//Setting attribute Title
self.refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:#"Pull To Refresh"];
//Adding as subview to tableView
[self.genericMainTableView addSubview:self.refreshControl];
}
You have to initiate the UIRefreshControl in your viewDidLoad like this:
// Pull To Refresh Code
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refreshControl addTarget:self action:#selector(handleRefresh:) forControlEvents:UIControlEventValueChanged];
Here is your selector handleRefresh:
-(void) handleRefresh:(UIRefreshControl *) refreshControl{
[self performSelector:#selector(yourMethodHere)];
}
Also try to check that the reference to your selector is working or not. Click on your selector wile holding command button.
You just need a scorllview,and set refreshcontrol to it will do the trick.
Whatever controller you are in.