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<blockquote data-quote="xstep" data-source="post: 922845" data-attributes="member: 11647">In the first one, you are using an NSString template that will allocate the space needed to return an NSString type for what you are creating.In the second one, you are converting a C string which has different memory requirements, so you have to first allocated memory for an NSString type.Note also that initWithCString is deprecated. See the <a href="http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html#//apple_ref/occ/clm/NSString/stringWithFormat:" target="_blank">NSString Class reference</a>.Lastly, the crasher occurs because you are trying to use a class method with an object instance. When you see the documentation mentioned above, you'll notice class methods have a plus (+) sign in front of them while an instance method has a minus (-) sign in front of them. A class method can only be used with the class name while a instance method works with instance variables you have have allocated.</blockquote>

[QUOTE="xstep, post: 922845, member: 11647"] In the first one, you are using an NSString template that will allocate the space needed to return an NSString type for what you are creating. In the second one, you are converting a C string which has different memory requirements, so you have to first allocated memory for an NSString type. Note also that initWithCString is deprecated. See the [URL="http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html#//apple_ref/occ/clm/NSString/stringWithFormat:"]NSString Class reference[/URL]. Lastly, the crasher occurs because you are trying to use a class method with an object instance. When you see the documentation mentioned above, you'll notice class methods have a plus (+) sign in front of them while an instance method has a minus (-) sign in front of them. A class method can only be used with the class name while a instance method works with instance variables you have have allocated. [/QUOTE]

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