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Method Declarations

The following conventions are used in method declarations:

• A “+” precedes declarations of class methods.

• A “-” precedes declarations of instance methods.

• Argument and return types are declared using the C syntax for type casting.

• Arguments are declared after colons (:), for example:

  - (void)setWidth:(int)newWidth height:(int)newHeight

  Typically, a label describing the argument precedes the colon—the following example is valid but is considered bad style:

  - (void)setWidthAndHeight:(int)newWidth :(int)newHeight

  Both labels and colons are considered part of the method name.

• The default return and argument type for methods is id, not int as it is for functions. (However, the modifier unsigned when used without a following type always means unsigned int.)

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