The following code describes a simple example using POST method.(How one can pass data by POST method) Here, I describe how one can use of POST method. 1. Set post string with actual username and password. NSString *post = [NSString stringWithFormat:@”Username=%@&Password=%@”,@”username”,@”password”]; 2. Encode the post string using NSASCIIStringEncoding and also the post string you need … 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.
Typically NSString *yourFriendlyNSString = (__bridge NSString *)yourFriendlyCFString; and CFStringRef yourFriendlyCFString = (__bridge CFStringRef)yourFriendlyNSString; Now, if you want to know why the __bridge keyword is there, you can refer to the Apple documentation. There you will find: __bridge transfers a pointer between Objective-C and Core Foundation with no transfer of ownership. __bridge_retained or CFBridgingRetain casts an … Read more
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
The short answer: YES, ARC retains and releases dispatch queues. And now for the long answer… If your deployment target is lower than iOS 6.0 or Mac OS X 10.8 You need to use dispatch_retain and dispatch_release on your queue. ARC does not manage them. If your deployment target is iOS 6.0 or Mac OS … Read more
Yes, this is correct. Also took me a while to trust that this is indeed the right thing to do. You do realize that in this case, the override is not necessary as you don’t do more than the standard generated setter would do? Only if you add more code to setImageURLString: would you need … Read more
For anyone still curious about how to turn off ARC on individual files, here’s what I did: Go to your project settings, under Build Phases > Compile Sources Select the files you want ARC disabled and add -fno-objc-arc compiler flags. You can set flags for multiple files in one shot by selecting the files then … Read more
UIPopoverControllers should always be held in an instance variable. It is a good practice to create a strong property for it. UPDATE: As of iOS 8 you should be using UIPopoverPresentationController. Then you don’t need to keep a reference to the popover because it is managed by the presentation controller. Code example (works both on … Read more
There is no downside. Use it. Do it today. It is faster than your old code. It is safer than your old code. It is easier than your old code. It is not garbage collection. It has no GC runtime overhead. The compiler inserts retains and releases in all the places you should have anyway. … Read more
The difference is that an object will be deallocated as soon as there are no strong pointers to it. Even if weak pointers point to it, once the last strong pointer is gone, the object will be deallocated, and all remaining weak pointers will be zeroed out. Perhaps an example is in order. Imagine our … Read more