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iphone Programming Glossary: variableiPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention ivar naming convention duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've noticed that in a lot of the reference materials out there I.. work I've noticed that in a lot of the reference materials out there I see that a lot of the time variables are named _variable in the .h file then are @synthesize'd in the .m file as @synthesize variable _variable.. in a lot of the reference materials out there I see that a lot of the time variables are named _variable in the .h file then are @synthesize'd in the .m file as @synthesize variable _variable Why is this done..
http://stackoverflow.com/questions/2371489/why-do-you-use-an-underscore-for-an-instance-variable-but-not-its-corresponding do you use an underscore for an instance variable but not its corresponding property duplicate Possible Duplicate How does an underscore in front of.. not its corresponding property duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I am new to iphone development.I am doing research on voice recording.. by CGFloat level void setLevel CGFloat v Your question Why declare a property named level for a variable named _level and why name a variable with a leading _ in the first place I don't know. How it works..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c an underscore in Objective C duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've always avoided underscores in my variable names perhaps because.. in front of a variable in a cocoa objective c class work I've always avoided underscores in my variable names perhaps because its just not what was done back in my learning Java in college days. So when I..
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone run yet as its a callback. So largeImage wont be valid yet. largeImage needs to be an instance variable not scoped to the method. I use this construct to do this when using the method but you may find something..
iOS: how to perform an HTTP POST request? http://stackoverflow.com/questions/5537297/ios-how-to-perform-an-http-post-request request returningResponse NSURLResponse response error NSError error This returns a NSData variable that you can process. IMPORTANT Remember to kick off the synchronous request in a separate thread to..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you should always inject those dependencies into the controller i.e. pass in the objects it.. so I'm going to look it up using the BookWarehouse class method comparable to a global variable BookWarehouse warehouse BookWarehouse getSingleton ... Instead the dependencies should be injected like.. void initWithWarehouse BookWarehouse warehouse myBookWarehouse is an instance variable myBookWarehouse warehouse myBookWarehouse retain void doSomething I need to do something with the BookWarehouse..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c rule of thumb is that if I want to hang on to an object for some length of time if it's a member variable in a class for instance then I need to make sure the object's reference count knows about me. As described.. creation class methods return an autoreleased object. For example in the following example the variable s has a reference count of 1 but after the event loop completes it will be destroyed. NSString s NSString..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature self.locale localeIdentifier return self @end Basically just changed the name of the static locale variable in case there was some conflict with the static declared in the subclass and added the extra NSLog...
When do you make an underscore in front of an instance variable? [duplicate] http://stackoverflow.com/questions/837559/when-do-you-make-an-underscore-in-front-of-an-instance-variable do you make an underscore in front of an instance variable duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class.. front of an instance variable duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've seen this at Apple inside UIPickerView.h id UIPickerViewDataSource.. objective c cocoa cocoa touch share improve this question A lot of people use this for private variables to differentiate between private variables and public variables within an object. It is a completely..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention ivar naming convention duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've noticed that in a lot of the reference materials out there I see that a lot of the time variables are named _variable in.. in front of a variable in a cocoa objective c class work I've noticed that in a lot of the reference materials out there I see that a lot of the time variables are named _variable in the .h file then are @synthesize'd in the .m file as @synthesize variable _variable Why is this done What am I missing Thanks iphone objective.. a variable in a cocoa objective c class work I've noticed that in a lot of the reference materials out there I see that a lot of the time variables are named _variable in the .h file then are @synthesize'd in the .m file as @synthesize variable _variable Why is this done What am I missing Thanks iphone objective c share improve..
http://stackoverflow.com/questions/2371489/why-do-you-use-an-underscore-for-an-instance-variable-but-not-its-corresponding do you use an underscore for an instance variable but not its corresponding property duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I am new to iphone.. do you use an underscore for an instance variable but not its corresponding property duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I am new to iphone development.I am doing research on voice recording in iphone .I have downloaded the speak here sample program.. In the case of level @property CGFloat level can be replaced by CGFloat level void setLevel CGFloat v Your question Why declare a property named level for a variable named _level and why name a variable with a leading _ in the first place I don't know. How it works is answered in LevelMeter.m CGFloat level return _level void..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c property names with an underscore in Objective C duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've always avoided underscores in my variable names perhaps because its just not what was done back in my learning Java in college.. C duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've always avoided underscores in my variable names perhaps because its just not what was done back in my learning Java in college days. So when I define a property in Objective C this is what I naturally do...
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone Also when findLargeImage returns the resultblock wont have run yet as its a callback. So largeImage wont be valid yet. largeImage needs to be an instance variable not scoped to the method. I use this construct to do this when using the method but you may find something more suitable to your use. node.view findLargeImage UIImage..
iOS: how to perform an HTTP POST request? http://stackoverflow.com/questions/5537297/ios-how-to-perform-an-http-post-request Synchronously NSData sendSynchronousRequest NSURLRequest request returningResponse NSURLResponse response error NSError error This returns a NSData variable that you can process. IMPORTANT Remember to kick off the synchronous request in a separate thread to avoid blocking the UI. Asynchronously void start Don't forget..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers injection design pattern. In a nutshell this means that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you should always inject those dependencies into the controller i.e. pass in the objects it needs via methods . If you follow the dependency injection.. void doSomething I need to do something with the BookWarehouse so I'm going to look it up using the BookWarehouse class method comparable to a global variable BookWarehouse warehouse BookWarehouse getSingleton ... Instead the dependencies should be injected like this @implementation BookPickerViewController void initWithWarehouse.. should be injected like this @implementation BookPickerViewController void initWithWarehouse BookWarehouse warehouse myBookWarehouse is an instance variable myBookWarehouse warehouse myBookWarehouse retain void doSomething I need to do something with the BookWarehouse object which was injected for me myBookWarehouse..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c under which you should call retain and release . My general rule of thumb is that if I want to hang on to an object for some length of time if it's a member variable in a class for instance then I need to make sure the object's reference count knows about me. As described above an object's reference count is incremented by calling.. What's important to note is that again by convention all object creation class methods return an autoreleased object. For example in the following example the variable s has a reference count of 1 but after the event loop completes it will be destroyed. NSString s NSString stringWithString @ Hello World If you want to hang onto..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature locale @ @ self.description self.locale.description self.locale localeIdentifier return self @end Basically just changed the name of the static locale variable in case there was some conflict with the static declared in the subclass and added the extra NSLog. But look what that NSLog prints 2011 07 15 16 35 24.322 DemoApp..
When do you make an underscore in front of an instance variable? [duplicate] http://stackoverflow.com/questions/837559/when-do-you-make-an-underscore-in-front-of-an-instance-variable do you make an underscore in front of an instance variable duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've seen this at Apple inside UIPickerView.h id UIPickerViewDataSource.. do you make an underscore in front of an instance variable duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've seen this at Apple inside UIPickerView.h id UIPickerViewDataSource _dataSource why's that underscore there Does it have a..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention ivar naming convention duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've noticed that in a lot of the reference materials out there I see that a lot of the.. objective c class work I've noticed that in a lot of the reference materials out there I see that a lot of the time variables are named _variable in the .h file then are @synthesize'd in the .m file as @synthesize variable _variable Why is this.. work I've noticed that in a lot of the reference materials out there I see that a lot of the time variables are named _variable in the .h file then are @synthesize'd in the .m file as @synthesize variable _variable Why is this done What am I missing..
http://stackoverflow.com/questions/2371489/why-do-you-use-an-underscore-for-an-instance-variable-but-not-its-corresponding do you use an underscore for an instance variable but not its corresponding property duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa.. variable but not its corresponding property duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I am new to iphone development.I am doing research on voice recording in iphone .I have.. level can be replaced by CGFloat level void setLevel CGFloat v Your question Why declare a property named level for a variable named _level and why name a variable with a leading _ in the first place I don't know. How it works is answered in LevelMeter.m..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c property names with an underscore in Objective C duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've always avoided underscores in my variable names perhaps because its just not what.. How does an underscore in front of a variable in a cocoa objective c class work I've always avoided underscores in my variable names perhaps because its just not what was done back in my learning Java in college days. So when I define a property in..
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone resultblock wont have run yet as its a callback. So largeImage wont be valid yet. largeImage needs to be an instance variable not scoped to the method. I use this construct to do this when using the method but you may find something more suitable..
iOS: how to perform an HTTP POST request? http://stackoverflow.com/questions/5537297/ios-how-to-perform-an-http-post-request NSURLRequest request returningResponse NSURLResponse response error NSError error This returns a NSData variable that you can process. IMPORTANT Remember to kick off the synchronous request in a separate thread to avoid blocking the..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers nutshell this means that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you should always inject those dependencies into the controller i.e. pass in the objects it needs via methods.. with the BookWarehouse so I'm going to look it up using the BookWarehouse class method comparable to a global variable BookWarehouse warehouse BookWarehouse getSingleton ... Instead the dependencies should be injected like this @implementation.. @implementation BookPickerViewController void initWithWarehouse BookWarehouse warehouse myBookWarehouse is an instance variable myBookWarehouse warehouse myBookWarehouse retain void doSomething I need to do something with the BookWarehouse object which..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c release . My general rule of thumb is that if I want to hang on to an object for some length of time if it's a member variable in a class for instance then I need to make sure the object's reference count knows about me. As described above an object's.. convention all object creation class methods return an autoreleased object. For example in the following example the variable s has a reference count of 1 but after the event loop completes it will be destroyed. NSString s NSString stringWithString..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature self.locale localeIdentifier return self @end Basically just changed the name of the static locale variable in case there was some conflict with the static declared in the subclass and added the extra NSLog. But look what that NSLog..
When do you make an underscore in front of an instance variable? [duplicate] http://stackoverflow.com/questions/837559/when-do-you-make-an-underscore-in-front-of-an-instance-variable do you make an underscore in front of an instance variable duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've seen.. make an underscore in front of an instance variable duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've seen this at Apple inside UIPickerView.h id UIPickerViewDataSource _dataSource why's.. know about iphone objective c cocoa cocoa touch share improve this question A lot of people use this for private variables to differentiate between private variables and public variables within an object. It is a completely optional way of working...
pass NSMutableArray to UITableViewController http://stackoverflow.com/questions/10259218/pass-nsmutablearray-to-uitableviewcontroller to UITableViewController and view it on the table .. how can I do that I mean I want to pass NSMutableArray or any Variable from UIViewController to UITableViewController not create a table I want to pass newBooksArray to UITableViewController..
http://stackoverflow.com/questions/13139430/detect-device-type mainScreen bounds .size.height 568 else iphone 3.5 inch screen else ipad UPDATE You can also use MACRO or define Variable for check is that iPhone5 iPhone4 or iPad like Bellow #define isiPhone5 UIScreen mainScreen bounds .size.height 568 TRUE..
How to Access String Variable in One View Controller to Another view Controller http://stackoverflow.com/questions/2228242/how-to-access-string-variable-in-one-view-controller-to-another-view-controller to Access String Variable in One View Controller to Another view Controller I am new to iphone development Now i want to access the string variable..
Objective-C: How Can I Access String Variable As a Global? http://stackoverflow.com/questions/2238103/objective-c-how-can-i-access-string-variable-as-a-global C How Can I Access String Variable As a Global I am new to iPhone development. I want to access a string variable in all the class methods and I want to access..
Xcode debug with iPhone app is slow and laggy http://stackoverflow.com/questions/3226311/xcode-debug-with-iphone-app-is-slow-and-laggy dependent Is there a way I can debug the debugger behaviour UPDATE The complete message is Timed out fetching data. Variable display may be inaccurate. Googling for it i discovered that it happens when Xcode gdb is trying to look inside data formatters... i discovered that it happens when Xcode gdb is trying to look inside data formatters. Someone suggested to disable Run Variable View Use Data Formatter in xcode 3.2 previous i guess it is Debug Variables View Enable Data Formatters and it seems to.. Someone suggested to disable Run Variable View Use Data Formatter in xcode 3.2 previous i guess it is Debug Variables View Enable Data Formatters and it seems to work for me too till now So now I am asking why D UPDATE2 This solved the debugger..
http://stackoverflow.com/questions/3601341/iphone-global-variable Global Variable I have two views with their own .h and .m files of course. How can I declare a bool or any variable for that matter in..
http://stackoverflow.com/questions/472103/lower-case-k-in-cocoa convention but what does the k in variable names signify i.e. kMaxImageViewSize I looked in the Apple documentation on Variable names and found no mention of it. Thanks for answering iphone cocoa cocoa touch share improve this question That's..
Tracking variable or memory change in XCode? http://stackoverflow.com/questions/4801175/tracking-variable-or-memory-change-in-xcode
“Variable Undeclared” error when compiling to iOS Device, but not for Simulator http://stackoverflow.com/questions/6047671/variable-undeclared-error-when-compiling-to-ios-device-but-not-for-simulator Variable Undeclared&rdquo error when compiling to iOS Device but not for Simulator I have an custom UIVIewController that is the..
Objective C alloc/release error http://stackoverflow.com/questions/6928028/objective-c-alloc-release-error nonatomic copy NSString xmlBody @property nonatomic retain GDataXMLDocument doc in m #import tchLoader.h #import Variable.h #import DisplayVariable.h @implementation tchLoader @synthesize responseXMLData lastLoadedResponseXMLData @synthesize.. xmlBody @property nonatomic retain GDataXMLDocument doc in m #import tchLoader.h #import Variable.h #import DisplayVariable.h @implementation tchLoader @synthesize responseXMLData lastLoadedResponseXMLData @synthesize conn @synthesize doc @synthesize.. @selector xmlDidFinishLoading _delegate xmlDidFinishLoading void insertAnswers NSMutableArray answeredVariables for Variable variable in answeredVariables NSInteger pageID variable pageId NSMutableArray answers NSMutableArray arrayWithCapacity..
how to pass an string value in url in iphone app http://stackoverflow.com/questions/7088079/how-to-pass-an-string-value-in-url-in-iphone-app parser objectWithString json_string error nil i have this url i want that category selected 350 should get value from Variable how to do this I am doing but not getting result if i give var name instead of 350. iphone objective c share improve..
Syntax help - Variable as object name [duplicate] http://stackoverflow.com/questions/7940809/syntax-help-variable-as-object-name help Variable as object name duplicate Possible Duplicate create multiple variables based on an int count Objective C Equivalent of PHP's.. duplicate Possible Duplicate create multiple variables based on an int count Objective C Equivalent of PHP's &ldquo Variable Variables&rdquo How would I create and reference an object using a variable as it's name Example for int i 1 i 7 i CGRect.. Possible Duplicate create multiple variables based on an int count Objective C Equivalent of PHP's &ldquo Variable Variables&rdquo How would I create and reference an object using a variable as it's name Example for int i 1 i 7 i CGRect myRectNum..
How to assign a variable inside a block to a variable outside a block? http://stackoverflow.com/questions/7962721/how-to-assign-a-variable-inside-a-block-to-a-variable-outside-a-block to assign a variable inside a block to a variable outside a block I'm getting a Variable is not assignable missing __block type specifier in the line aPerson participant . How can I make sure the block can access..
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