要寫 Objective-C 的程式理所當然的要在 Mac OS X 上 XD
不過有時候想學而手邊沒有 Mac 的話也可以在 Linux / Windows 開發
這一切都要感謝 GNUStep 的計畫
在 Gentoo 上如果只是要開發 non-GUI 的程式只要安裝 gnustep-base/gnustep-base 即可
會連帶安裝 gnustep-base/gnustep-make
都裝好後我們就可以開始寫啦!
一個最簡單的 Objective-C 如下
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| #import <Foundation/Foundation.h> | |
| int main(int argc, const char * argv[]){ | |
| NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; | |
| NSLog(@"Programming is fun!"); | |
| [pool drain]; | |
| return 0; | |
| } |
至於要編譯他的方法指令如下
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| gcc `gnustep-config --debug-flags` -o main main.m `gnustep-config --base-libs` |
很簡單吧！
如果想要看完整的參數請參考 gnustep-config –help
但是這樣每次要 build 好像都很麻煩要多打好多東西
所以建立一個簡單的 script
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| #!/bin/sh | |
| if [ $# -ne 1 ]; then | |
| echo "Usage: $0 name" | |
| exit 1 | |
| fi | |
| gcc `gnustep-config --debug-flags` -o $1 $1.m `gnustep-config --base-libs` | |
| exit 0 |
這樣下次要 build 只要打 build_objc.sh file
如果想要開發圖形介面 需要多安裝 gnustep-base/gnustep-gui
然後編譯變成要打 gcc `gnustep-config –debug-flags` -o main main.m `gnustep-config –gui-libs`