调用方法

[object  method];[object methodWithInput:input];output = [object methodWithOutput];output = [object methodWithInputAndOutput:input];id myObject = [NSString string];NSString* myString = [NSString string];

嵌套消息

function1 ( function2() );[NSString stringWithFormat:[prefs format]];

多个输入參数的方法

-(BOOL)writeToFile:(NSString *)path atomically:(BOOL)useAuxiliaryFile;BOOL result = [myData writeToFile:@"/tmp/log.txt"atomically:NO];

原文： part 1