防止警告“PerformSelect可能导致泄漏，因为它的选择器未知” [英] to prevent warning from "PerformSelect may cause a leak because its selector is unknown"

问题描述

可能重复：

performSelector可能导致泄漏，因为它的选择器未知

我做了一个NSDictionary来将我的输入（NSString）转换为选择器。 选择器映射如下所示：

I did a NSDictionary to convert my input(NSString) to selector. The "selector map" is looked as follows :

[self setCmdSelectorMap:[NSDictionary dictionaryWithObjectsAndKeys: 
                         [NSValue valueWithPointer:@selector(doOpenBrowserByString:)], @"openBrowser",
                         [NSValue valueWithPointer:@selector(syncData:)], @"sync",
                         [NSValue valueWithPointer:@selector(getCachedString:)], @"getCachedString",
                         nil]];

当我尝试获取其中一个选择器并按照以下方式执行时，会引发警告：

When I try to fetch one of these selector and perform it by follows, it cause a warning :

sel = [[_cmdMap objectForKey:command] pointerValue];
NSLog(@"selector determined : %@", NSStringFromSelector(sel));
[self performSelector:sel withObject:arguments];

警告说：PerformSelector可能导致泄漏，因为它的选择器未知。有没有办法防止这种警告发生？或者有没有更安全的方式来执行这样的行动？

The warning says : PerformSelector may cause a leak because its selector is unknown. Is there any way to prevent this warning from occurring? or is there any "safer" way to perform such an action?

谢谢你们：）

推荐答案

只需使用：

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
[self performSelector:sel withObject:arguments];
#pragma clang diagnostic pop

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