使用ARC项目中的非ARC库的方法？ [英] Using methods from non-ARC libraries in an ARC project?

问题描述

我使用的是非常好的非ARC项目： https：// github .com / boredzo / iso-8601-date-formatter

I am using the excellent, however, non-ARC project: https://github.com/boredzo/iso-8601-date-formatter

我试图从ARC中的非ARC中使用以下方法项目：

I am trying to use the following method from this library which is non-ARC in an ARC project:

- (NSDate *) dateFromString:(NSString *)string timeZone:(out NSTimeZone **)outTimeZone;

我试过：

group.updatedAt = [formatter dateFromString:someString timeZone:[NSTimeZone localTimeZone]];
group.updatedAt = [formatter dateFromString:someString timeZone:*__autorelease [NSTimeZone localTimeZone]];
group.updatedAt = [formatter dateFromString:someString timeZone:(*__autoreleasing [NSTimeZone localTimeZone]] *);
group.updatedAt = [formatter dateFromString:someString timeZone:[[NSTimeZone localTimeZone] autorelease]];

注意，我是iOS的新手，所以我没有任何内存管理经验。

Note that I am fairly new to iOS, so I don't have any experience with memory management.

但在所有这些尝试中，我收到以下错误讯息：

But with all these attempts, I received the following error message:

Implicit conversion of an Objective-C pointer to 'NSTimeZone *__autoreleasing *' is disallowed with ARC

隐式转换Objective-C指针为NSTimeZone * __ autoreleasing * 那么如何在ARC项目中使用非ARC库的方法？

So how do I use a non-ARC library's methods in an ARC Project?

推荐答案

code> NSTimeZone 是一个输出参数，因此您需要传递一个指针，如下所示：

The NSTimeZone is an output parameter, so you need to pass a pointer to a pointer, like this:

NSTimeZone *theTimeZone = nil;
group.updatedAt = [formatter dateFromString:someString timeZone:&theTimeZone];

当函数返回时， theTimeZone 设置为函数的输出值。

When the function returns, theTimeZone will be set to the output value of the function.

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