net objective c and the ios sdk

... worldwide.Layered Architecture C libraries and system calls Core Services (C libraries and Objective-C frameworks) Media Layer (C libraries and Objective-C frameworks) Cocoa (Mac OS) and Cocoa touch (iPhone ... object-oriented capabilities to C language Runtime system (C library) Dynamic typing Dynamic binding GNU C compiler compiles C and Objective-C Apple donated Objective-C to GNU project (open source) ... Trang 21Core Services20 Core Foundation C Library Strings, dates, collections, threads, etc Address Book Framework Managing contact info CFNetwork C Library Low-level network access Core Location

Ngày tải lên: 21/07/2014, 23:36

... scroll the window so the insertion point... you can see that there are references to the Car class and car local variable You could uncheck the Ignore case checkbox and just change the ... But there’s good news: Objective- C provides a way to limit the effects of dependency- caused recompilations. Dependency issues exist because the Objective- C compiler needs certain pieces ... ahead and make the Car.h and Car.m files with Xcode, just as you did with Tire and Engine. Copy and paste the @interface for Car into Car.h, which now looks like this: #import <Cocoa/Cocoa.h>

Ngày tải lên: 12/08/2014, 20:22

... directly The final control is a pop- up menu that shows the call stack, which is the current set of active functions If A calls B, and B calls C, C is considered to be at the top of the stack, ... (period) Cycle backward through the completions Control-/ Move to the next completion placeholder Command-control-S Make a snapshot Control-F Move the cursor forward Control-B Move the cursor backward ... (continued) Trang 6 Table 7-1 (continued)Keystroke Description Control-T Transpose the characters adjacent to the cursor Control-D Delete the character to the right of the cursor Control-L Center

Ngày tải lên: 12/08/2014, 20:22

... retain count increases by 1, and when the object is released, the retain count is decreased by 1 When the retain count reaches 0, the object is destroyed The object’s dealloc message is called ... NSString *desc = [someObject description]; NSLog (@"%@", desc); [desc release]; There has got to be a better way And luckily, there is! Everyone into the Pool! Cocoa has the concept of the autorelease ... object, which is why the retain count can be larger than 1 In the case of the RetainCount1 program, main() owned the RetainTracker object, so main() is responsible for cleaning up the object Recall

Ngày tải lên: 12/08/2014, 20:22

... new compiler feature that says “create the accessors for this attribute.” For the line of code @synthesize rainHandling;, the compiler emits the compiled code for -setRainHandling: and -rainHandling. ... retain the car it has been installed in. If the car retains the engine, and the engine retains the car, then neither refer- ence count will go to zero, and neither will ever be cleaned up. Car’s ... do a search and replace on the name,... directory and contains the code that adds such a category to NSString @interface The declaration of a category looks a lot like the declaration

Ngày tải lên: 12/08/2014, 20:22

... discussed copy yet. The copy method, of course, makes a copy of an object. The copy message tells an object to create a brand new object and to make the new object the same as the receiver. CHAPTER ... new car is allocated by sending allocWithZone: to the class of the object that’s receiving this message: Car *carCopy; carCopy = [[[self class] allocWithZone: zone] init]; CarParts-copy contains ... that. Copying the Car Now that we can make copies of engines and tires and their subclasses, it’s time to make the Car itself copiable. As you’d expect, Car needs to adopt the NSCopying protocol:

Ngày tải lên: 12/08/2014, 20:22

... thing1 encode the array, which encodes thing1, which encodes the array, which encodes thing1 again, over and over again? Luckily, Cocoa is clever in its implementation of the archivers and unarchivers ... it can cause other objects to be encoded, like the string and the array, and any contents we might put in that array Once the entire pile of objects has finished encoding keys and values, the ... method The name is a property, and the @property statement says that users of Garage can access and change the name And there’s a method to print out the contents To implement a collection of cars,

Ngày tải lên: 12/08/2014, 20:22

... NSView, and you can’t have an Objective-C class inheriting from std::string. You can put pointers to Objective-C objects into C++ objects Since all Objective-C objects are dynamically allocated, ... 287CaseTool projectadding the AppController Objective-C class file, 250 Interface Builder and, 249, 256screenshot of, 249 Xcode and, 249 @catch, 314categoriesaccessing the instance variables of a class, ... performance when you need them, and you can use Objective-C’s dynamic nature and the Cocoa toolkit where it makes sense Trang 4APPENDIX: Coming to Objective-C from Other Languages 313A common

Ngày tải lên: 12/08/2014, 20:22

... by the creation of an OleDbConnection object, where the constructor is passed the connection string (Table 2.6). Here the database is a Microsoft Access file located at c:\purchaseOrder.mdb C# ... Visual Studio NET, click New Project, then click Visual C# projects, and then Windows Application Set the name to “ UDP Client” and press OK You could alternately click Visual. .. that ... the compiler complaining about this line of code, simply call the constructor thus: new TcpListener(IPAddress.Any,8080) C# public void handlerThread() { Socket handlerSocket = (Socket)alSockets[alSockets.Count-1];

Ngày tải lên: 12/08/2014, 21:20

... view... clicking and dragging on the edge of the image More advanced features can be accessed via Internet Explorer’s execCommand function Only FontName, FontSize, and ForeColor are used in the ... request once it is received. The server-side script can retrieve this data by accessing the Request.Form collection. The Response.Write command prints this data back out to the browser. To try the ... request to the server and start receiving data back from the server by calling the GetResponse method. The return value is then cast to an HttpWebResponse object, which is then held in the httPresponse

Ngày tải lên: 12/08/2014, 21:20

... secure than plain text. The second section describes asymmetric encryption, which is most applicable for securing data in transit. The chapter concludes with a discussion on sym- metric encryption, ... one character for another can be broken without knowing the key or even the mechanism by which the text was encrypted. The process is known as frequency analysis . The most common character ... proxy machine, which is outside of the firewall, and the proxy allows the client to connect to it. Data from the client to the proxy is forwarded via the previ- ously opened connection. This is the

Ngày tải lên: 12/08/2014, 21:20

... WebProxy class This class contains twopublic variables and two functions Create the class thus: C# public class WebProxy { public Socket clientSocket; public Form1 UserInterface; } VB.NET Public Class ... accessed siteschange sometimes The proxy could, during lull periods, check some of thecurrently cached Web sites against the live versions and update the cacheaccordingly 11.2.2 Keep-alive connections ... instance ofthe WebProxy class and starts its run method in a new thread It sets theclass’s clientSocket and UserInterface properties so that the WebProxyinstance can reference the form and the socket

Ngày tải lên: 12/08/2014, 21:20

... Significant members of the TcpStatistics class Method or Property Purpose ConnectionsAccepted Determines the number of connections accepted ConnectionsInitiated Determines the number of connections ... Controls tab, and then add the Microsoft Communications control (MSCOMM.OCX) Drag this onto the form, and setconnected Add a button to the form, named btnPhone, click it, and add this code: C# private ... InterfaceStatistics class IncomingPacketsDiscarded Gets the number of incoming packets discarded IncomingPacketsWithErrors Gets the number of incoming packets with errors IncomingUnknownProtocolPackets

Ngày tải lên: 12/08/2014, 21:20

... Anexternal certificate contains information about the certification authority,the certificate user, the validity period of the certificate, and the public keycer-of the certificate user, the certification ... method onthe ComPlusService component Instead it writes an instruction to theComPlusService queue in MSMQ, which is then read back by componentservices, which executes the method on the component ... application in VisualStudio NET Add a reference to the ComPlusService DLL created in theprevious example, and then draw two textboxes, tbSQL and tbDSN, and abutton named btnExecSQL Double click the

Ngày tải lên: 12/08/2014, 21:20

... that holds Objective- C code and will be processed by the Objective- C compiler File names ending in c are handled by the C compiler, and cpp files are the province of the C+ + compiler (In Xcode, all ... over the world xxi Chapter Hello w elcome to Learn Objective- C on the Mac! This book is designed to teach you the basics of the Objective- C language Objective- C is a superset of C and is the language ... applications that have a true Mac OS X look and feel This book teaches you the Objective- C language and introduces you to its companion, Apple’s Cocoa toolkit Cocoa is written in Objective- C and contains...

Ngày tải lên: 07/12/2012, 15:47

... family of the C6 x processors is the fixed-point C6 4x An application-speci c integrated circuit (ASIC) has a DSP core with customized circuitry for a speci c application A C6 x processor can be used ... function to find the factorial of a number (factclasm .c) ;Factclasmfunc.sa Linear ASM function called from C to find factorial ref _factclasmfunc: cproc reg mv mv sub loop: [b] _factclasmfunc number ... with the CPU Between the four DMA channels, channel has the highest priority 82 Architecture and Instruction Set of the C6 x Processor and channel has the lowest priority Each DMA channel can be...

Ngày tải lên: 17/10/2013, 19:15

... Program Calling ASM Function Using Circular Buffer (FIRcirc) The C program FIRcirc .c (Figure 4.33) calls the ASM function FIRcircfunc.asm (Figure 4.34), which implements an FIR lter using a circular ... of the C source program FIR .c, which implements an FIR lter It is a generic FIR program, since the coefcient le included, bs2700.cof (Figure 4.5), species the lters characteristics This coefcient ... frequency Use as input the wav le TheForce.wav and verify the scrambling/descrambling scheme Interception of the speech signal can be made more difcult by changing the modulation frequency dynamically...

Ngày tải lên: 24/10/2013, 09:15

... Michalson, and R Chassaing, Fast and efficient filter design and implementation on the TMS32 0C6 711 digital signal processor, International Conference on Acoustics Speech and Signal Processing (ICASSP), ... stages The coefficient file contains the numerator coefficients, a’s (three per stage), and the denominator coefficients, b’s (two per stage) The a’s and b’s used in this book correspond to the b’s and ... Proceedings of the 7th Allerton Conference on Circuit and System Theory, 1969, pp 69–78 L B Lawrence and K V Mirna, A new and interesting class of limit cycles in recursive digital filters, Proceedings...

Ngày tải lên: 28/10/2013, 16:15

... Select View Æ Watch Window and insert the two expressions j and out (right click on the Watch window) Click on +out to expand and view out[0] and out[1] that represent the real and imaginary components, ... REFERENCES J W Cooley and J W Tukey, An algorithm for the machine calculation of complex Fourier series, Mathematics of Computation, Vol 19, 1965, pp 297–301 J W Cooley, How the FFT gained acceptance, ... coefficients are the same as BP55.cof, with a center frequency at Fs/4, introduced in Example 4.4 The coefficient file coeffs.h also contains a set of coefficients identical to LP55.cof, which represents...

Ngày tải lên: 07/11/2013, 10:15

... result, the samples of the interference are highly correlated On the other hand, the samples of the wideband signal are relatively uncorrelated The characteristics of the narrowband interference permits ... convergence and accuracy of the adaptation process (adaptive step size) is b 218 Adaptive Filters For each speci c time n, each coefficient, or weight, wk(n) is updated or replaced by a new coefficient, ... structures and is an adjustable FIR filter Whereas the coefficients of the frequency-selective FIR filter discussed in Chapter are fixed, the coefficients, or weights, of the adaptive FIR filter can...

Ngày tải lên: 07/11/2013, 10:15