［已解决］swift中出错：dispatch_release is unavailable

参考：

closures – Wait until an asynchronous api call is completed – Swift/IOS – Stack Overflow

去写代码：

        dispatch_semaphore_wait(loginSemaphore, DISPATCH_TIME_FOREVER)

        dispatch_release(loginSemaphore)

结果出错：

dispatch_release  is unavailable

如图：

swift dispatch_release  is unavailable

‘dispatch_release’ is unavailable · Issue #9 · shinobicontrols/iOS8-day-by-day

不存在此函数了？

那有啥替代的函数，还是完全不需要关系，不需要release？

dispatch_release unavailable on ARC? · Issue #204 · ReactiveCocoa/ReactiveCocoa

“I changed the platform to use 5.1 instead of 6.0. Searching for the error message reveals that dispatch_retain and dispatch_release is no longer allowed when targeting iOS 6 (and OS X 10.8 too, apparently, though I have not tested that).”

Coderwall | dispatch_release is no longer needed in iOS 6 with ARC

ios – dispatch_release compiler error when upgrading deployment target – Stack Overflow

“ Compiler does automatically emit code to release dispatch queues and other GCD objects as Objective-C objects. ”

objective c – Does ARC support dispatch queues? – Stack Overflow

［总结］

目前新版本的，iOS 6之后，就不需要用：dispatch_release了。

如果非要用，可以添加编译器参数：

 -DOS_OBJECT_USE_OBJC=0

其他后来的代码：

ios – Wait for async task to finish completion block before returning in app delegate – Stack Overflow

也的确没了dispatch_release

转载请注明：在路上 » ［已解决］swift中出错：dispatch_release is unavailable