2014/10/15 下午 10:11:38

iphone Programming Glossary: myblock

Unable to post image into facebook using SLComposeViewController?

http://stackoverflow.com/questions/14868560/unable-to-post-image-into-facebook-using-slcomposeviewcontroller

composeViewControllerForServiceType SLServiceTypeFacebook SLComposeViewControllerCompletionHandler myBlock ^ SLComposeViewControllerResult result if result SLComposeViewControllerResultCancelled NSLog @ Cancelled else NSLog.. else NSLog @ Done controller dismissViewControllerAnimated YES completion Nil controller.completionHandler myBlock controller setInitialText @ Check out my Christmas Gift controller addImage @ gift.jpg self presentViewController controller..

Asynchronously dispatched recursive blocks

http://stackoverflow.com/questions/5394647/asynchronously-dispatched-recursive-blocks

dispatched recursive blocks Suppose I run this code __block int step 0 __block dispatch_block_t myBlock myBlock ^ if step STEPS_COUNT return step dispatch_time_t delay dispatch_time DISPATCH_TIME_NOW NSEC_PER_SEC 2 dispatch_after.. dispatched recursive blocks Suppose I run this code __block int step 0 __block dispatch_block_t myBlock myBlock ^ if step STEPS_COUNT return step dispatch_time_t delay dispatch_time DISPATCH_TIME_NOW NSEC_PER_SEC 2 dispatch_after delay.. dispatch_time_t delay dispatch_time DISPATCH_TIME_NOW NSEC_PER_SEC 2 dispatch_after delay dispatch_get_current_queue myBlock dispatch_time_t delay dispatch_time DISPATCH_TIME_NOW NSEC_PER_SEC 2 dispatch_after delay dispatch_get_current_queue myBlock..

EXC_BAD_ACCESS when copying or retaining Block

http://stackoverflow.com/questions/7111541/exc-bad-access-when-copying-or-retaining-block

Block As far as I understand a Block acts like an object in that you can send copy or release messages to it e.g myBlock copy However whenever I do this or release a block I get EXC_BAD_ACCESS. If I use the block functions everything works as.. or release a block I get EXC_BAD_ACCESS. If I use the block functions everything works as expected e.g. Block_copy myBlock I thought both ways of releasing and copying blocks were identical It's not that much of a problem but it is a little annoying..

Is there an advantage to using blocks over functions in Objective-C?

http://stackoverflow.com/questions/8647462/is-there-an-advantage-to-using-blocks-over-functions-in-objective-c

do something like pass around a context object full of relevant values. With a block you can do this int num1 42 void ^myBlock void ^ NSLog @ num1 is d num1 num1 0 Changed after block is created Sometime later in a different scope myBlock num1 is.. void ^myBlock void ^ NSLog @ num1 is d num1 num1 0 Changed after block is created Sometime later in a different scope myBlock num1 is 42 So simply by using the variable num1 its value at the time myBlock was defined is captured. From Apple's documentation.. Sometime later in a different scope myBlock num1 is 42 So simply by using the variable num1 its value at the time myBlock was defined is captured. From Apple's documentation Blocks are a useful alternative to traditional callback functions for..