I'm implementing an iOS app which make requests using REST service. And I want to cancel all the previous REST calls when I make a new call. Can I do it in the global queue in GCD without Operation Queue? Thanks
how to do cancel requests in GCD without operation queue
563 Views Asked by Gabriel At
1
There are 1 best solutions below
Related Questions in IOS
- UIWebView Screen Fitting Issue
- ios responsive design not working (too wide in portrait orientation)
- Setting View orientation to portrait is ignored
- How do I add custom cells to TableView in Swift?
- UIWebView not loading URL in simulator
- What is the limit for number of subscribers to a stream(publisher's) in opentok/tokbox iOS SDK?
- How to generate request format for WCF web service method for Mac and iPhone
- Difference between gethostname() and [NSProcessInfo hostName]?
- How to force close ipad/iphone keypad when input element is not focused using JS?
- iOS app rejected because of in-app purchase
Related Questions in OBJECTIVE-C
- UIWebView Screen Fitting Issue
- ios responsive design not working (too wide in portrait orientation)
- Setting View orientation to portrait is ignored
- How do I add custom cells to TableView in Swift?
- UIWebView not loading URL in simulator
- What is the limit for number of subscribers to a stream(publisher's) in opentok/tokbox iOS SDK?
- How to generate request format for WCF web service method for Mac and iPhone
- Difference between gethostname() and [NSProcessInfo hostName]?
- How to force close ipad/iphone keypad when input element is not focused using JS?
- iOS app rejected because of in-app purchase
Related Questions in REST
- UIWebView Screen Fitting Issue
- ios responsive design not working (too wide in portrait orientation)
- Setting View orientation to portrait is ignored
- How do I add custom cells to TableView in Swift?
- UIWebView not loading URL in simulator
- What is the limit for number of subscribers to a stream(publisher's) in opentok/tokbox iOS SDK?
- How to generate request format for WCF web service method for Mac and iPhone
- Difference between gethostname() and [NSProcessInfo hostName]?
- How to force close ipad/iphone keypad when input element is not focused using JS?
- iOS app rejected because of in-app purchase
Related Questions in GRAND-CENTRAL-DISPATCH
- UIWebView Screen Fitting Issue
- ios responsive design not working (too wide in portrait orientation)
- Setting View orientation to portrait is ignored
- How do I add custom cells to TableView in Swift?
- UIWebView not loading URL in simulator
- What is the limit for number of subscribers to a stream(publisher's) in opentok/tokbox iOS SDK?
- How to generate request format for WCF web service method for Mac and iPhone
- Difference between gethostname() and [NSProcessInfo hostName]?
- How to force close ipad/iphone keypad when input element is not focused using JS?
- iOS app rejected because of in-app purchase
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular # Hahtags
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
GCD does not provide an API to cancel blocks. So you will have to implement this cancellation yourself.
The easiest way probably would be to set a global flag 'canceled' and check that inside of your blocks. If the flag is set, immediately return from your block. Then after all blocks have finished you can reset the flag and enqueue your new block.
Even though that sounds simple, this requires some nontrivial code. It would be much easier to use NSOperationQueue instead of reimplementing its features on top of plain GCD.