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Introduction to objective-C

Source: Internet
Author: User
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Some time ago, I took some time to touch objective-C and installed the "Black Apple" and Lion system. The version is 10.7.2. I also need to install the xcode development environment. The corresponding version is xocde_4.2_and_ios_5_sdk_for_lion.dmg.

Xcode3 is incompatible with the lion system and cannot see the xcode tool after it is installed. Pay special attention to this.

The installation process is simple. Basically, the development environment of most books is xocde_3. Therefore, I learned the book "objective-C basic tutorial" here. I tried xcode4 and sorted out the relevant knowledge.

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