Type conversion causing compilation error in ARC environment

I am having a problem in type conversion in ARC environment.If anyone would be kind enough to address it as well:

When i used this line of code:

NSData *resultData = nil;

NSMutableDictionary *passwordQuery = [query mutableCopy];

[passwordQuery setObject: (id) kCFBooleanTrue forKey: (__bridge  id) kSecReturnData];

status = SecItemCopyMatching((__bridge  CFDictionaryRef) passwordQuery, (CFTypeRef *) &resultData);

Then i am recieving an error:

Cast of an indirect pointer to an Objective C pointer to 'CFTypeRef*'(aka 'const void **')is disallowed with ARC.

Please suggest me any way to ressolve this..

Thanks in advance..


The result data type is merely a CFTypeRef until after the call to SecItemCopyMatching so start by passing in a CFTypeRef:

CFTypeRef resultData = nil;
status = SecItemCopyMatching((__bridge CFDictionaryRef) passwordQuery,  &resultData);

Since the query specified that the resultData should be a CFDataRef the resultData is now a CFDataRef, and you can now cast it as such. then cast it further into an NSData.

CFDataRef resultCFData = (CFDataRef)resultData;
NSData *resultNSData = (__bridge NSData *)resultCFData;

Or in one line:

NSData *resultNSData = (__bridge NSData *)(CFDataRef)resultData;

Need Your Help

Setting the startDate on Datepicker

jquery twitter-bootstrap datepicker

I am trying to create a calendar using bootstrap datepicker that allows users to select a day starting 24 hours from today. I saw this question posted on SO before but when I try the solution sugg...

jQuery - click event is not firing

javascript php jquery

Hello I try to make my table rows click able.

About UNIX Resources Network

Original, collect and organize Developers related documents, information and materials, contains jQuery, Html, CSS, MySQL, .NET, ASP.NET, SQL, objective-c, iPhone, Ruby on Rails, C, SQL Server, Ruby, Arrays, Regex, ASP.NET MVC, WPF, XML, Ajax, DataBase, and so on.