I have this code:
for( id aThing in someArray )
{
if ( [ aThing respondsToSelector: @selector(setTitle:) ] )
{
[ self replaceIn: aThing
readSelector: @selector(title)
writeSelector: @selector(setTitle:)
withTable: tableName
];
}
}
- (void)replaceIn: thing readSelector: (SEL)selectorIn writeSelector:
(SEL)selectorOut withTable: (NSString *)tableName;
{
NSString *key = [ thing performSelector: selectorIn ];
...
NSString *rep = ...
[ thing performSelector: selectorOut withObject: rep ];
}
Now, using Arc I am told that "PerformSelector may cause a leak because its
selector is unknown".
What I am supposed to do about this? I really want to have code without
warnings.
Update:
I guess Arc has no way to know, whether "selectorIn" is something like "copy".
So I am quite willing to reassure it that "selectorIn" is always something like
title, stringValue, toolTip, etc.
I think I should declare the SEL as __attribute__((ns_returns_not_retained)).
But how exactly? There really should be some examples.
Gerriet.
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