Turns out, I’ve written some serious nonsense If zombies worked like I originally wrote, turning on zombies would directly lead to innumerable false positives… There is some isa-swizzling going on, probably in _objc_rootRelease, so any override of dealloc should still be called with zombies enabled. The only thing that won’t happen with zombies is the … Read more
You still can implement -dealloc under ARC, which appears to be the appropriate place to remove the observation of key values. You just don’t call [super dealloc] from within this method any more. If you were overriding -release before, you were doing things the wrong way.
I had the same issue on my project when I was trying to mix C code (.h and .c) with Objective-C code. Found the reason of the issue: Check your .pch file to make sure every Objective-C framework #import (such as #import <UIKit/UIKit.h>) is enclosed in: #ifdef __OBJC__ #endif If they’re outside of this conditional … Read more
If a variable: Is declared in a class using ARC. Is used solely for class implementation (not exposed as part of the class interface). Does not require any KVO. Does not require any custom getter/setter. Then it is appropriate to declare it as an ivar without a corresponding @property/@synthesize, and to refer to it directly … Read more
Surround each case itself with braces {}. That should fix the issue (it did for me in one of my projects).
Here is what I know about variable properties atomic //default nonatomic strong=retain //default weak retain assign //default unsafe_unretained copy readonly readwrite //default so below is the detailed article link where you can find above mentioned all attributes, that will definitely help you. Many thanks to all the people who have given the best answers here!! … Read more
A retain cycle is a situation when object A retains object B, and object B retains object A at the same time*. Here is an example: @class Child; @interface Parent : NSObject { Child *child; // Instance variables are implicitly __strong } @end @interface Child : NSObject { Parent *parent; } @end You can fix … Read more
I was getting this error and could not understand what was wrong. After some searching I found out that i forgot to disable zombies. To disable do the following:
This is indeed a new language feature, and if you must declare your ivars (rather than simply declaring properties and letting the compiler generate ivars for you) it’s a good practice. Your header files in theory should only expose public interface for your classes; everything else belongs in the implementation. One caveat is that implementation-file … Read more
The difference is subtle, but you should opt for the autorelease versions. Firstly, your code is much more readable. Secondly, on inspection of the optimized assembly output, the autorelease version is slightly more optimal. The autorelease version, – (NSString *)hello:(NSString *)name { return [NSString stringWithFormat:@”Hello, %@”, name]; } translates to “-[SGCAppDelegate hello:]”: push {r7, lr} … Read more