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Answer 1

+1 A:

You don't need to change your include, you need to make the iAd (or any other new framework) linked weakly:

In your target, find iAd in the linked frameworks and change its "Role" from "Required" to "Weak".

To handle the variable conditionally, use NSClassFromString function, like this:

Class AdClass = NSClassFromString(@"ADBannerView");
if(AdClass) {//if the class exists
    ADBannerView* myAd = [[AdClass alloc] initWithFrame:CGRectZero];
    // do something with the ad
}

If OS is older than iOS 4.0, AdClass will be nil and the code won't execute. Note that using ADBannerView* as the type of the variable shouldn't cause any problems, as it's just a hint for a compiler and is the same as id after compilation.

Mo 2010-06-27 18:09:00

I have tried changing to weak already, but it doesn't seem to work - it keeps saying no such file or directory.What can be wrong? (I went all the way from Target, Get info, and I set the type to weak instead of required).Also, I need to handle my AdBannerView in many methods (bringing it to the front mostly). Where should I declare the snippet you sent? At implementation? ViewDidLoad obviously won't work, so where? (sorry about my basic skills here).Thanks

GSchv 2010-06-27 18:16:06

you should import iAd as usual (`#import <iAd/iAd.h>`). You can use the above code anywhere you want to use `ADBannerView` (including `viewDidLoad` if you want). After the first line, `AdClass` is exactly the same as `ADBannerView` class, or nil if not supported, the rest is the same as using the class in normal way.

Mo 2010-06-27 18:50:48

Answer 2

A:

Great - what should I import? #import? Cause this would crash.

Thanks

GSchv 2010-06-27 18:29:50

This should be a comment on the appropriate answer, not an answer by itself.

Brad Larson 2010-06-28 15:12:53

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