ios7

问题 I have created a custom UICollectionViewCell that contains a UITextField inside of it which is only accessible when the cell is selected. The CollectionView has multi select enabled and the problem is that when trying to select the UITextField to type in it, the cell is deselected instead of giving the TextField focus. How do I allow focus on the UITextField inside of the CollectionViewCell without causing the cell to be deselected? Note: I've also tried adding buttons to the cell template

问题 Trying to diagnose why my game is building up memory, causing it to eventually slow down to the point of unresponsiveness. Based on previously asked questions, i think i might know what's causing it, not sure though, so i will just post what i think it might be. [self performSelector:@selector(createObstacle0) withObject:nil afterDelay:1.0]; [self performSelector:@selector(score0) withObject:nil afterDelay:1]; .... -(void)createObstacle0 { int yMin = (CGRectGetMidY(self.frame)+190); int yMax

问题 I have used a UITableView control to show a list of customers that the user can select from. I've divided this into a number of sections, because the customers they need to select will vary from day to day — so the sections are used to divide between the days. For some reason, there's an excessive amount of whitespace being included in the section header. I don't recall this being the case with iOS 5 (which this application was originally developed with). Can anyone nudge me in the right

问题 I'm getting the warning above when selecting a segue in didSelectRowAtIndexPath. This is happening on an iPad. The iPhone gives a different warning, and I'll see if a fix to this also fixes the other. I do have two segues in the method. The first works without incident. The second picks up the warning. I've looked around the net, and checked out others' solutions. nada, so I'm posting here.. Here's the code: (I'm open to better ways to write this!) -(void)tableView:(UITableView *)tableView

问题 I have a very strange problem that I don't understand. I have a UITableView which causes a crash when I click on a row. self.tableView.backgroundColor = [UIColor clearColor]; self.tableView.delegate = self; <-- If I remove this, no crash caused self.tableView.dataSource = self; The funny thing is that I have no code at all inside didSelectRowAtIndexPath , and is still crashes? The log doesn't say much, I get (lldb) but when looking a bit further, I got this from debugger. [UITableView

问题 I'm trying to create a dead simple storyboard app with a layout similar to the following. I've got the list/detail view setup but I can't figure out how to link additional pages. I want the "go" page to be my start page and drive off that. Can someone help me with a dead simple example solution on how you would set this up? I'm trying to use "push" segues. 回答1: Here are different ways to create a segues: 1 - From Control To Controller: 2 - Using Connection Inspector 3 - From View Controller

问题 I am using this code to get the UDID of iOS 7 device in my app +(NSString*)uniqueIDForDevice { NSString* uniqueIdentifier = nil; if( [UIDevice instancesRespondToSelector:@selector(identifierForVendor)] ) { // >=iOS 7 uniqueIdentifier = [[[UIDevice currentDevice] identifierForVendor] UUIDString]; } else { //<=iOS6, Use UDID of Device CFUUIDRef uuid = CFUUIDCreate(NULL); //uniqueIdentifier = ( NSString*)CFUUIDCreateString(NULL, uuid);- for non- ARC uniqueIdentifier = ( NSString*

问题 In my application i am running a timer in background for every 8 seconds to play a custom sound,it works fine ,but it get stops at later sometime,so how can i play the sound continuously in background? Currently i am using the below code to play the sound in background SystemSoundID soundID; AudioServicesCreateSystemSoundID((__bridge CFURLRef)filePath, &soundID); AudioServicesPlaySystemSound(soundID); let me know the good solution to play the sound continuously in background 回答1: Short answer

问题 I have a problem concerning getting a UITableViewController inside of a UIView to get touches in iOS8 (it worked fine in iOS7). Here's the setup code: UITableViewController *tvc = [[UITableViewController alloc] initWithStyle:UITableViewStyleGrouped]; tvc.tableView.userInteractionEnabled = YES; tvc.tableView.frame = CGRectMake(0, 0, self.incentivesContainerView.frame.size.width, self.incentivesContainerView.frame.size.height); [self addChildViewController:tvc]; self.incentivesContainerView

问题 I'm loading just 1 picker in a view, one component is months (which displays fine), the other displays the current year (as well as previous and next years); The picker displays just fine if I comment out the line to pre-select the value for the current month. Here is my code: [super viewDidLoad]; // Do any additional setup after loading the view. NSDate *date = [NSDate date]; NSCalendar *calendar = [[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar]; NSDateComponents