Categories
Programming/C Programming/iOS Software

[參考] Objective-C Cheat Sheet and Quick Reference

Objective-C Cheat Sheet and Quick Reference URL : http://www.raywenderlich.com/4872/objective-c-cheat-sheet-and-quick-reference

Categories
Programming/iOS

[iOS] Objective-C , block 寫法

在新的iOS API中block被大量用來取代傳統的delegate和callback,而新的API會大量使用block主要是基於以下兩個原因: 可以直接在程式碼中撰寫等會要接著執行的程式,直接將程式碼變成函數的參數傳入函數中,這是新API最常使用block的地方。 可以存取區域變數,在傳統的callback實作時,若想要存取區域變數得將變數封裝成結構才能使用,而block則是可以很方便地直接存取區域變數。   — Objective C Blocks: Summary, Syntax & Best Practices  http://amattn.com/p/objective_c_blocks_summary_syntax_best_practices.html    

Categories
Copy_N_Paste Programming/misc

A simple Objective-C Method Declaration and Definition

定義 – (void) sayHello: (NSString*) name; implementation : – (void) sayHello: (NSString*) name { NSMutableString *message = [[NSMutableString alloc] initWithString:@”Hello there “]; [message appendString:name]; NSLog(message); [message release]; } // simple.m 宣告 sayHello method: #import “Simple.h” @implementation Simple – (void) sayHello: (NSString *) name { NSMutableString *message = [[NSMutableString alloc] initWithString:@”Hello there “]; [message appendString:name]; NSLog(message); […]