I don’t know how to say, here is the example:
Objective C Code:
NSLog(@"This is a test ok, %@?", yourName);
What is the %@ called? a String place holder?
I don’t know how to say, here is the example: Objective C Code: NSLog(@This
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I don’t know how to say, here is the example:
Objective C Code:
NSLog(@"This is a test ok, %@?", yourName);
What is the %@ called? a String place holder?
The
%@is a so-called format specifier, like%dto print decimal numbers or%fto print floats. The%@is specific to Objective-C and callsdescriptionon the passed object. This method in turn returns a string that then gets printed. So this is roughly equivalent to:In the case of
NSString, the description merely returns itself. However, you can overridedescriptionfor your own objects to provide a useful descriptive string.