Re: Comparing a CFStringRef with a string literal?
Re: Comparing a CFStringRef with a string literal?
- Subject: Re: Comparing a CFStringRef with a string literal?
- From: Bryan Henry <email@hidden>
- Date: Sat, 31 Jan 2009 18:50:29 -0500
NSString *efStr = [EFPW stringValue];
if ([efStr isEqualToString:@"my password") {
NSLog(@"sjdskjf");
}
- OR -
CFStringRef efStr = (CFStringRef)[EFPW stringValue];
if (CFStringCompare(efStr, CFSTR("my password"), 0) ==
kCFCompareEqualTo) {
NSLog(@"sjdskjf");
}
I'm not sure why you'd want to use CFStringRef in the first place, but
there are numerous things wrong with what you're doing.
1) You can't compare the contents of objects using == - that just
compares the pointers, not the objects themselves. For strings, you'd
want to use either -isEqualToString: or CFStringCompare().
2) Why are you trying to use CFStringRef when -stringValue (I'm
assuming everything else is correct and EFPW is an NSNumber*) returns
an NSString*?
3) The first argument of NSLog() must be a NSString* - you're trying
to pass it a "const char*" (a compile-time constant c-string).
I recommend that you by a book or two about the basics of Objective-C
and Cocoa before getting to much further. There's also tons upon tons
of tutorials available just by searching Google, and you can also
using the mailing list archives at http://cocoabuilder.com to help you
with questions. You should also forward any other Cocoa questions you
have to the Cocoa-Dev list, as this list is for issues with Xcode.
- Bryan
On Jan 31, 2009, at 4:35 PM, Arnaud Nicolet wrote:
Hi,
I have this piece of code which does not work:
CFStringRef efstr=([EFPW stringValue]);
if (efstr=="my password"){
NSLog("sjdskjf");
}
I also tried with strcmp and with a single "=". Even when both
values are the same, the equal test fails. What I am doing wrong?
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