Posted By

yar on 08/21/12

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iphone
ios

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Last Edited at 08/21/12 04:34am

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Alloc Method to Choose Between Regular and Phone

/ Published in: Objective C

This method will alloc the current class unless the device is a phone (also defined here). Then it will try to alloc the class with the suffix "Phone."

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#define IS_PHONE  UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPhone
 
#define ALLOC_PER_DEVICE()  id retVal = nil; \
                            NSString *className = NSStringFromClass(self);\
                            if (IS_PHONE && ![className hasSuffix:@"Phone"]) {\
                                className = [NSString stringWithFormat:@"%@Phone", className];\
                                Class newClass = NSClassFromString(className);\
                                retVal = [newClass alloc];\
                            }\
                            if (!retVal)\
                                retVal = [super alloc];\
                            assert(retVal != nil);\
                            return retVal\
 
// Sample Usage
+ (id) alloc {
    ALLOC_PER_DEVICE();
}