防止警告“PerformSelect可能导致泄漏,因为它的选择器未知”

时间:2012-05-29 04:36:31

标签: objective-c ios macos

  

可能重复:
  performSelector may cause a leak because its selector is unknown

我做了一个NSDictionary来将我的输入(NSString)转换为选择器。 “选择器地图”如下所示:

[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如下方式执行时,会引发警告:

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?或者是否有任何“更安全”的方式来执行此类行动?

谢谢你们:)

1 个答案:

答案 0 :(得分:127)

请使用:

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