retain

What's the changes between developing for the iPhone and the iPhone 4?

由 狂风中的少年 提交于 2019-12-08 11:22:42
问题 Hey, I'm working on an iPhone app but I've heard from some people that it's a size difference between the iPhone and the iPhone 4 and if it's not iPhone 4 committable to use the retain display it will be rejected by Apple. So my questions is: What size does my app need to be in since it's not 320 x 480 anymore. And will the app automatically shrink the size down when it's used on an older iPhone or do I have to do something more with it? Hope this makes sense to you guys! Thank you in Advance

Retain Count Question: Some Guidance, Please

由 谁说我不能喝 提交于 2019-12-08 10:17:33
问题 [I'm sure this is not odd at all, but I need just a bit of help] I have two retain properties @property (nonatomic, retain) NSArray *listContent; @property (nonatomic, retain) NSArray *filteredListContent; and in the viewDidLoad method I set the second equal to the first (so now the retainCount is two, I think): self.filteredListContent = self.listContent; and then on every search I do this self.filteredListContent = [listContent filteredArrayUsingPredicate:predicate]; I thought I should do a

Sum consecutive observations by some variable

由 回眸只為那壹抹淺笑 提交于 2019-12-08 03:54:50
问题 I'm just learning to use SAS, so bear with me a bit. I have the following sample patient data on prescription usage and I'd like to try to combine observations to form more of a patient story, but keep the timeline intact: data have; input dose $2. id $4. supply date $8.; datalines; "5" 1234 30 01012015 "10" 1234 30 02012015 "10" 1234 30 03012015 "5" 1234 30 04012015 "2" 1234 30 05012015 "5" 4321 30 07012016 "2" 9876 30 05012016 "2" 9876 30 06012016 "10" 9876 30 07012016 ; run; Where dose is

ObjC delegate methods never gets called

由 北慕城南 提交于 2019-12-08 02:29:27
问题 I am creating instances of a class FlickrImage parsing a Flickr API photos response. The class has a method getLocation that does another API call to get the geolocation: NSLog(@"getting location for %i",self.ID); NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; OFFlickrAPIRequest *flickrAPIRequest = [[OFFlickrAPIRequest alloc] initWithAPIContext[appDelegate sharedDelegate].flickrAPIContext]; [flickrAPIRequest setDelegate:self]; NSString *flickrAPIMethodToCall = @"flickr.photos.geo

Sum consecutive observations by some variable

由 a 夏天 提交于 2019-12-07 18:10:28
I'm just learning to use SAS, so bear with me a bit. I have the following sample patient data on prescription usage and I'd like to try to combine observations to form more of a patient story, but keep the timeline intact: data have; input dose $2. id $4. supply date $8.; datalines; "5" 1234 30 01012015 "10" 1234 30 02012015 "10" 1234 30 03012015 "5" 1234 30 04012015 "2" 1234 30 05012015 "5" 4321 30 07012016 "2" 9876 30 05012016 "2" 9876 30 06012016 "10" 9876 30 07012016 ; run; Where dose is the dosage in mg, id is patient ID, supply is the number of days' supply of the medication, and date is

@property retain OR copy

由 北城以北 提交于 2019-12-07 17:58:40
问题 First I read this article I think I should use "copy" in my programe. Problem is using NSMutableDictionary copy it will terminate. ***** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[__NSCFDictionary removeAllObjects]: mutating method sent to immutable object'** I have no idea about "mutating method sent to immutable object". I didn't set NSDictionary to NSMutabledictionary pointer. Here is my code .h file @interface Button : NSObject { @private

Does an NSManagedObject retain its NSManagedObjectContext?

由 谁都会走 提交于 2019-12-07 07:13:16
问题 NSManagedObject provides access to its NSManagedObjectContext, but does it retain it? According to "Passing Around a NSManagedObjectContext on iOS" by Marcus Zarra, "The NSManagedObject retains a reference to its NSManagedObjectContext internally and we can access it." How does Zarra know this and is he correct? I'm asking because I want to know if the NSManagedObjectContext will be dealloc 'ed in the tearDown method below. (I'm using CocoaPlant.) #import <SenTestingKit/SenTestingKit.h>

Android Viewholder for ViewPager

由 ∥☆過路亽．° 提交于 2019-12-07 03:01:22
问题 Hello I am using a ViewPager but I would now like to retain states, instead of having cells regenerated. I notice viewpager is very similar to a custom adapter for listviews, and they function similarly where listview regenerate data in cells after they are no longer on screen, viewpager is the same way. Is there a way to do a viewholder, some kind of object that retains the state of each view, after it is loaded initially, so that the viewpager cells load quicker. (there is some processing

Will self retain within block?

由 ╄→гoц情女王★ 提交于 2019-12-06 09:14:53
Before/After call the block, the retaincount is always 1. From apple block doc we know that the self should retain. Can anyone know why? NSLog(@"Before block retain count: %d", [self retainCount]); void (^block)(void) = ^(void){ UIImage* img = [UIImage imageNamed:@"hometown.png"]; [self setImage:img]; NSLog(@"After block retain count: %d", [self retainCount]); }; block(); First, retainCount is useless. Don't call it. . Blocks only retain captured objects when the block is copied. Thus, self won't be retained by the block in that example. OK I did some research, now things became more clear.

ObjC delegate methods never gets called

由 天涯浪子 提交于 2019-12-06 05:19:35
I am creating instances of a class FlickrImage parsing a Flickr API photos response. The class has a method getLocation that does another API call to get the geolocation: NSLog(@"getting location for %i",self.ID); NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; OFFlickrAPIRequest *flickrAPIRequest = [[OFFlickrAPIRequest alloc] initWithAPIContext[appDelegate sharedDelegate].flickrAPIContext]; [flickrAPIRequest setDelegate:self]; NSString *flickrAPIMethodToCall = @"flickr.photos.geo.getLocation"; NSDictionary *requestArguments = [[NSDictionary alloc] initWithObjectsAndKeys:FLICKR_API
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