Developing iOS apps on Mac 10.5.8

I have searched through mac dev center for iOS SDK compatible with 10.5.8, but couldn't find the sdk. I have a apple id (but have not ye开发者_高级运维t joined the developer program). I found xcode 3.2 but it says it needs Mac 10.6. Is it possible to develop ipad/iphone apps on Mac 10.5 and if so, how? (Btw, I do understand it is only $29 to upgrade to 10.6 but not ready to take the plunge right now)

Thank you for the answers. Joseph

Apple's current position is the following:

Xcode 3.2 requires an Intel-based Mac running Mac OS X Snow Leopard version 10.6.6 or later.

This is from the Xcode 3.2.6 Readme.

When iOS 4.0 was released, it required 10.6.2 as per this page.

https://developer.apple.com/library/ios/#releasenotes/General/RN-iPhoneSDK-4_0/_index.html%23//apple_ref/doc/uid/TP40009763

However, if you can locate version 3.1.4, it worked with 10.5 and iPhone OS 3 (if you have the SDK). It even ran on PowerPC systems. But I don't believe it works with the iOS versions 4+ (based on the references above).