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2014/10/15 ¤U¤È 10:12:59
iphone Programming Glossary: protocolsXcode - update ViewController label text from different view http://stackoverflow.com/questions/10052594/xcode-update-viewcontroller-label-text-from-different-view whats wrong with my code Thank you iphone objective c uilabel share improve this question You have to implement protocols for that. Follow this 1 In SettingView.h define protocol like this @protocol ViewControllerDelegate void updateLabel @end..
NSNotificationCenter vs delegation( using protocols )? http://stackoverflow.com/questions/1927965/nsnotificationcenter-vs-delegation-using-protocols vs delegation using protocols What are the pros and cons of each of them Where should I use them specifically iphone objective c delegates protocols.. What are the pros and cons of each of them Where should I use them specifically iphone objective c delegates protocols nsnotifications share improve this question The rule of thumb here is how many clients would like to be notified of..
Network Time Protocol for iPhone http://stackoverflow.com/questions/2269532/network-time-protocol-for-iphone question I have decided to investigate using NTP or maybe Simple NTP. Is there any open source implementation of these protocols for the iPhone So far I have managed to find a broken link . I am also aware that NTP has a C reference implementation so..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application your iPhone app with file types. In this informative question I learned that apps could be associated with custom URL protocols. That was almost one year ago and since then Apple introduced 'Document Support' which goes a step further and allows apps..
How should I architect my iPhone app to talk to my website? http://stackoverflow.com/questions/3943597/how-should-i-architect-my-iphone-app-to-talk-to-my-website to remind that Objective C is very expressive language. Code should read much like a sentence. Extend classes with protocols. As an example the other day I needed first line of a string. Sure you can write a one liner where you find first occurrence..
How to detect the end of loading of UITableView http://stackoverflow.com/questions/4163579/how-to-detect-the-end-of-loading-of-uitableview on the SDK to know when a uitableview loading has finished I don't see nothing neither on delegate nor on data source protocols. I can't use the count of the data sources because the loading of the visible cells only. iphone uitableview share improve..
iPhone - UIImagePickerControllerDelegate inheritance http://stackoverflow.com/questions/4727895/iphone-uiimagepickercontrollerdelegate-inheritance protocol to the same UIViewController and the error message vanished. So do I have to add both protocols to the ViewController when I add a UIImagePickerController if the UIImagePickerController is a subclass of UINavigationController.. though and doesn't declare a hypothetical imagePickerDelegate of its own so your delegate has to conform to both protocols. It makes sense because you're also assigning the same delegate to the UINavigationController part that knows nothing about..
UIView and initWithFrame and a NIB file. How can i get the NIB file loaded? http://stackoverflow.com/questions/5056219/uiview-and-initwithframe-and-a-nib-file-how-can-i-get-the-nib-file-loaded you've got an instance of your widget in whatever views you want Just like UIKit objects you can implement delegate protocols so that objects using your widget can be notified of interesting events and can provide data to display in the widget to..
Return to app behavior after phone call different in native code than UIWebView http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview According to Apple's documentation in order to make phone call from my app I need to implement the following protocols HTML link a href tel 1 408 555 5555 1 408 555 5555 a Native application URL string tel 1 408 555 5555 However upon completion..
Difference between protocol and delegates? http://stackoverflow.com/questions/5431413/difference-between-protocol-and-delegates between a protocol and a delegate and how can we declare variables in protocol class iphone objective c delegates protocols share improve this question A protocol declared with the @protocol syntax in Objective C is used the declare a set of.. of avoiding the inheritance design pattern and avoids tight coupling. Delegates are a use of the language feature of protocols. The delegation design pattern is a way of designing your code to use protocols where necessary. In the Cocoa frameworks.. are a use of the language feature of protocols. The delegation design pattern is a way of designing your code to use protocols where necessary. In the Cocoa frameworks the delegate design pattern is used to specify an instance of a class which conforms..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers I can easily use it in my own application assuming BookWarehouse and CheckoutController are generic interfaces i.e. protocols that I can implement @interface MyBookWarehouse NSObject BookWarehouse ... @end @implementation MyBookWarehouse ... @end..
dismissModalViewController AND pass data back http://stackoverflow.com/questions/6203799/dismissmodalviewcontroller-and-pass-data-back Thanks guys. iphone ios uiviewcontroller modalviewcontroller share improve this question You need to use delegate protocols... Here's how to do it Declare a protocol in your secondViewController's header file. It should look like this #import UIKit.. secondViewControllerDismissed @ THIS IS THE STRING TO SEND self dismissModalViewControllerAnimated YES Delegate protocols are EXTREMELY EXTREMELY EXTREMELY useful. It would do you good to familiarize yourself with them NSNotifications are another..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c you'll have to declare their methods somewhere. There are two basic approaches discussed in the Apple Docs on protocols 1 An Informal Protocol This can be done as NSWindow does in a category on NSObject. For example continuing the example above..
What is the difference between Notifications, Delegates, and Protocols? http://stackoverflow.com/questions/7118598/what-is-the-difference-between-notifications-delegates-and-protocols or Delegates and NSNotifications What is an Observer and how does it work iphone objective c delegates notifications protocols share improve this question You can find answers by searching in stackoverflow ... Delegates and notifications Protocoles..
Calling a method from another class in Objective C http://stackoverflow.com/questions/9629417/calling-a-method-from-another-class-in-objective-c calculate public void calculate todo class B public B Action calculate calculate Is it possible to do this using protocols. iphone objective c ios delegates share improve this question I just happened to see this post while researching. Here..
Consume WCF Web Service using Objective-C on iPhone http://stackoverflow.com/questions/982622/consume-wcf-web-service-using-objective-c-on-iphone theConnection webData NSMutableData data retain else NSLog @ theConnection is NULL Implement the NSURL and XMLParser protocols #pragma mark #pragma mark NSURLConnection methods void connection NSURLConnection connection didReceiveResponse NSURLResponse..
How to use Protocols objective-c http://stackoverflow.com/questions/13930883/how-to-use-protocols-objective-c to use Protocols objective c I need to inherit Picker selected values into the other place .I am trying the below code but null value is..
How to create a protocol with methods that are optional? http://stackoverflow.com/questions/322498/how-to-create-a-protocol-with-methods-that-are-optional set a few of the methods as optional iphone objective c share improve this question From the Apple page on Formal Protocols Optional Protocol methods can be marked as optional using the @optional keyword. Corresponding to the @optional modal keyword..
Difference between protocol and delegates? http://stackoverflow.com/questions/5431413/difference-between-protocol-and-delegates instance or class conforms to the necessary protocol i.e. it implements the methods specified in the protocol Protocols and delegates are not restricted only to Objective C and Mac iOS development but the Objective C language and the Apple..
Understanding @Protocols in Objective-C http://stackoverflow.com/questions/5738428/understanding-protocols-in-objective-c @Protocols in Objective C I am a beginner to programming and a beginner to Objective C. I learned basic C and decided to start learning.. decided to start learning Objective C. I am reading Programming in Objective C 2.0 by Steven Kochan. His section on Protocols is vague. He doesn't thoroughly explain WHY someone would want to use protocols in their programs nor does he give a concrete.. use a protocol to define methods that you want other people who subclass your class to implement. He also says that Protocols are good for sub classes to be able to implement certain methods without having to first define the actual methods. He also..
http://stackoverflow.com/questions/6082471/ios-development-why-do-i-always-get-the-a-connection-failure-occurred-on-the POST . If you want to have a deeper look at what I'm talking about go have a read at the spec sheet http www.w3.org Protocols rfc2616 rfc2616 sec8.html So the persistent connection used by ASIHTTPRequest wait for a 100 response to be sent which is..
What is the difference between Notifications, Delegates, and Protocols? http://stackoverflow.com/questions/7118598/what-is-the-difference-between-notifications-delegates-and-protocols is the difference between Notifications Delegates and Protocols What is the difference between Protocols or Delegates and NSNotifications What is an Observer and how does it work iphone.. is the difference between Notifications Delegates and Protocols What is the difference between Protocols or Delegates and NSNotifications What is an Observer and how does it work iphone objective c delegates notifications protocols..
Can Objective-C protocols and categories be inherited? http://stackoverflow.com/questions/7470994/can-objective-c-protocols-and-categories-be-inherited compilation or when the program first loads. Categories are added to classes when they the categories are loaded. Protocols define collections of method signatures that the classes conforming to them promise to implement. Once a class has declared.. declaration and implementation of the protocol methods but may also choose to override the superclass implementation. Protocols themselves can be extended to produce new protocols. consisting of a superset of the methods in the original protocol. In..
How to handle Objective-C protocols that contain properties? http://stackoverflow.com/questions/844678/how-to-handle-objective-c-protocols-that-contain-properties at hand MyProtocol.h @protocol MyProtocol NSObject @required @property nonatomic retain id anObject @optional TestProtocolsViewController.h void iDoCoolStuff @end #import MyProtocol.h @interface TestProtocolsViewController UIViewController MyProtocol.. retain id anObject @optional TestProtocolsViewController.h void iDoCoolStuff @end #import MyProtocol.h @interface TestProtocolsViewController UIViewController MyProtocol @end TestProtocolsViewController.m #import TestProtocolsViewController.h @implementation.. iDoCoolStuff @end #import MyProtocol.h @interface TestProtocolsViewController UIViewController MyProtocol @end TestProtocolsViewController.m #import TestProtocolsViewController.h @implementation TestProtocolsViewController @synthesize anObject anObject..
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