1、判斷字串是否相等使用isEqualToString: NSString *astring01 = @"This is a String!"; NSString *astring02 = @"This is a String!"; BOOL result = [astring01 isEqualToString:astring02]; NSLog(@"result:%d",result);2、判斷字元不相等:NSString *astring01 = @"This is
開發工具使用Mac的安裝盤或從apple網站下載Xcode開發代碼使用副檔名的分類 application delegate需要處理的內容ƒAt launch time, it must create an application’s windows and display them to the user.l It must initialize your data.l It must respond to “quit” requests.l It must handle
程式開發中根據要使用各種各樣的資料,如配製、檔案系統、資料庫等,iOS對這個有很好的支援PreferencesIf you’re going to create a program that has built-in preferences, you should do so using the Utility Application template. To create the special cartouched list used by preferences, you must
系統規格iPhone的規格Each is a 4.7- or 4.8-ounce computing device. Each contains a 620 MHz ARM CPU that has been underclocked to improve battery performance and reduce heat. The iPhone and iPhone 3G each include 128 MB of dynamic RAM (DRAM) and from 4 to 16
曆史NeXSTEPMany years ago Cocoa was known as NeXTSTEP . NeXT Computer developed and released version 1.0 ofNeXTSTEP in September of 1989, and versions 2.0 and 3.0 followed not far behind (in 1990 and 1992,respectively). In this early phase, NEXTSTEP
Book DescriptioniOS Forensic Analysis provides an in-depth look at investigative processes for the iPhone, iPod Touch, and iPad devices. The methods and procedures outlined in the book can be taken into any courtroom. With iOS information never
Book DescriptionThe authors of the bestselling Beginning iPhone 3 Development are back, with the same excellent material completely updated for iOS 4 and written from the ground up using the latest version of Apple’s Xcode 3. All source code has
KVC運用了一個isa-swizzling技術。isa-swizzling就是類型混合指標機制。KVC主要通過isa- swizzling,來實現其內部尋找定位的。isa指標,如其名稱所指,(就是is a kind of的意思),指向維護分發表的對象的類。該分發表實際上包含了指向實作類別中的方法的指標,和其它資料。 比如說如下的一行KVC的代碼:[site setValue:@"sitename" forKey:@"name"];就會被編譯器處理成:SEL sel =