Its just a guideline. You can call other instructions after [super dealloc]. however you can not access variables of the superclass anymore because they are released when you call [super dealloc]. It is always safe to call the superclass in the last line. Also KVO and depended (triggered) keys can produce side effects if they … Read more
If you are overriding the method you should still call the method in the super. Even if the super class is not doing anything with it today, Apple might one day change the implementation and your code will mysteriously stop working. If you really don’t need to do anything in that method, leave it out … Read more
The difference is that the first code-snippet you register defaults that will be used when the user has not made any changes to the “property”. So if you want to provide let’s say a “property” with the key name ‘Welcome message’, you could instead of having the property returning nil insert a default message ‘Welcome … Read more
You could also mask the component. With a bit fiddeling you can get the size of the component and cut it out with following code: CALayer* mask = [[CALayer alloc] init]; [mask setBackgroundColor: [UIColor blackColor].CGColor]; [mask setFrame: CGRectMake(10.0f, 10.0f, 260.0f, 196.0f)]; [mask setCornerRadius: 5.0f]; [picker.layer setMask: mask]; [mask release]; Don’t forget #import <QuartzCore/QuartzCore.h>
Try this… NSDate* sourceDate = [NSDate date]; NSTimeZone* sourceTimeZone = [NSTimeZone timeZoneWithAbbreviation:@”GMT”]; NSTimeZone* destinationTimeZone = [NSTimeZone systemTimeZone]; NSInteger sourceGMTOffset = [sourceTimeZone secondsFromGMTForDate:sourceDate]; NSInteger destinationGMTOffset = [destinationTimeZone secondsFromGMTForDate:sourceDate]; NSTimeInterval interval = destinationGMTOffset – sourceGMTOffset; NSDate* destinationDate = [[[NSDate alloc] initWithTimeInterval:interval sinceDate:sourceDate] autorelease]; This help respond to the current system timezone.
I have contacted an engineer at Apple’s support and he told me that simultaneous AVCaptureVideoDataOutput + AVCaptureMovieFileOutput use is not supported. I don’t know if they will support it in the future, but he used the word “not supported at this time”. I encourage you to fill a bug report / feature request on this, … Read more
It is little tricky , i get by the removing the subviews in *TWTWeetComposeViewController*, so it shows only alert when user is not loged in and by the clicking on setting button , we can open Setting page in my app. + (void)setAlertForSettingPage :(id)delegate { // Set up the built-in twitter composition view controller. TWTweetComposeViewController … Read more
If you want to make sure the label fits in the rectangle both width and height wise you can try different font size on the label to see if one will fit. This snippet starts at 300 pt and tries to fit the label in the targeted rectangle by reducing the font size. – (void) … Read more
The UITextField’s inputView property is nil by default, which means the standard keyboard gets displayed. If you assign it a custom input view, or just a dummy view then the keyboard will not appear, but the blinking cursor will still appear: UIView* dummyView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 1, 1)]; myTextField.inputView = dummyView; // Hide … Read more
Apparently there’s a bit of a gotcha according to the iPhone SDK Release Notes for iPhone OS 3.0: Issue: UIWebView can’t load local resources in apps built against 3.0. When using [UIWebView loadHTMLString:baseURL:], the HTML string should not refer to local resources with the file:// scheme. Instead, pass in NULL or a file:// URL for … Read more