所有这些评论都很棒，但我真的很惊讶没有人提到谷歌的Objective-C风格指南，这是不久前发布的。我认为他们做得很彻底。

对于初学者来说，一个很明显的方法是:利用Xcode的自动缩进功能。即使是从其他源复制/粘贴代码，粘贴完代码后，也可以选择整个代码块，右键单击它，然后选择选项重新缩进该代码块中的所有内容。

Xcode会解析这个section并根据括号，循环等缩进它。这比每一行都按空格键或tab键要有效率得多。

#import "MyClass.h"

@interface MyClass ()
- (void) someMethod;
- (void) someOtherMethod;
@end

@implementation MyClass

只释放dealloc方法中的属性。如果你想释放属性所持有的内存，只需将其设置为nil:

self.<property> = nil;

功能性更强。

Objective-C是面向对象的语言，但是Cocoa框架是函数式风格的，并且在很多情况下是函数式设计的。

There is separation of mutability. Use immutable classes as primary, and mutable object as secondary. For instance, use NSArray primarily, and use NSMutableArray only when you need. There is pure functions. Not so many, buy many of framework APIs are designed like pure function. Look at functions such as CGRectMake() or CGAffineTransformMake(). Obviously pointer form looks more efficient. However indirect argument with pointers can't offer side-effect-free. Design structures purely as much as possible. Separate even state objects. Use -copy instead of -retain when passing a value to other object. Because shared state can influence mutation to value in other object silently. So can't be side-effect-free. If you have a value from external from object, copy it. So it's also important designing shared state as minimal as possible.

但是也不要害怕使用不纯函数。

There is lazy evaluation. See something like -[UIViewController view] property. The view won't be created when the object is created. It'll be created when caller reading view property at first time. UIImage will not be loaded until it actually being drawn. There are many implementation like this design. This kind of designs are very helpful for resource management, but if you don't know the concept of lazy evaluation, it's not easy to understand behavior of them. There is closure. Use C-blocks as much as possible. This will simplify your life greatly. But read once more about block-memory-management before using it. There is semi-auto GC. NSAutoreleasePool. Use -autorelease primary. Use manual -retain/-release secondary when you really need. (ex: memory optimization, explicit resource deletion)

使用LLVM/Clang静态分析仪

注意:在Xcode 4中，这是内置在IDE中。

你可以使用Clang Static Analyzer在Mac OS X 10.5上分析你的C和Objective-C代码(还没有c++)。安装和使用起来很简单:

从本页下载最新版本。 从命令行，cd到您的项目目录。 执行scan-build -k -V xcodebuild。

(还有一些额外的限制等等，特别是你应该在“调试”配置中分析一个项目——详情请参阅http://clang.llvm.org/StaticAnalysisUsage.html——但这或多或少就是它的总结。)

分析器然后为您生成一组网页，显示可能的内存管理和编译器无法检测的其他基本问题。