自动引用计数问题:将非本地对象的地址传递给 __autoreleasing 参数以进行回写

问题描述

我正在尝试将指针传递给指向方法的指针，但显然 ARC 对我的操作方式存在一些问题.这里有两种方法:

I'm trying to pass pointer to pointer to a method, but apparently ARC has some issues with how I'm doing it. Here the two methods:

+ (NSString *)personPropertyNameForIndex:(kSHLPersonDetailsTableRowIndex)index 
{
    static NSArray *propertyNames = nil;

    (nil == propertyNames) ? 
        [self SHL_initPersonPropertyNamesWithArray:&propertyNames] : NULL;
}

+ (void)SHL_initPersonPropertyNamesWithArray:(NSArray **)theArray
{
    *theArray = [[NSArray alloc] 
                 initWithObjects:@"name", @"email", @"birthdate", @"phone", nil];
}

我收到以下错误:

自动引用计数问题:将非本地对象的地址传递给 __autoreleasing 参数以进行回写

Automatic Reference Counting Issue: Passing address of non-local object to __autoreleasing parameter for write-back

在出现以下命令的那一行:

On the line which the following command appears:

[self SHL_initPersonPropertyNamesWithArray:&propertyNames] : NULL;

推荐答案

这种情况需要 __strong 存储限定符.

The __strong storage qualifier is needed for this case.

+ (void)SHL_initPersonPropertyNamesWithArray:(NSArray * __strong *)theArray

但是，此代码不遵循 基本内存管理规则.

However, this code doesn't follow the Basic Memory Management Rules.

您拥有您创建的任何对象

You own any object you create

您使用名称以alloc"、new"、copy"或mutableCopy"开头的方法创建对象(例如，alloc、newObject 或 mutableCopy).

You create an object using a method whose name begins with "alloc", "new", "copy", or "mutableCopy" (for example, alloc, newObject, or mutableCopy).

你为什么要这样做?

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