2014/10/15 下午 10:09:14

iphone Programming Glossary: foo

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject NSNumber bar @property readwrite retain NSNumber bar @end @implementation Foo @synthesize bar.. @interface Foo NSObject NSNumber bar @property readwrite retain NSNumber bar @end @implementation Foo @synthesize bar void baz NSNumber numberOne NSNumber numberWithInt 1 Both set the value of bar through..

Create singleton using GCD's dispatch_once in Objective C

http://stackoverflow.com/questions/5720029/create-singleton-using-gcds-dispatch-once-in-objective-c

Instance variables with underscore in Objective-C 2.0 and renaming with @synthetize leads to optimization warnings by the 'Analyze' tool of Xcode 4 [duplicate]

http://stackoverflow.com/questions/6124109/instance-variables-with-underscore-in-objective-c-2-0-and-renaming-with-synthet

variable method argument naming in Objective C I copy paste his example code here @interface Foo NSObject id _bar @property nonatomic retain id bar id initWithBar id aBar @end @implementation Foo @synthesize.. Foo NSObject id _bar @property nonatomic retain id bar id initWithBar id aBar @end @implementation Foo @synthesize bar _bar id initWithBar id aBar self super init if self nil _bar aBar return self @end In.. super init if self nil _bar aBar return self @end In the implementation of some methods of the Foo class I use for example _bar aBar instead of using bar aBar The 'Analyse' tool introduced by Xcode 4..

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

Objective C HTML escape/unescape

http://stackoverflow.com/questions/659602/objective-c-html-escape-unescape

in Objective C. What I want is something like this psuedo code NSString string @ lt span gt Foo lt span gt string stringByUnescapingHTML Which returns span Foo span Hopefully unescaping all other.. code NSString string @ lt span gt Foo lt span gt string stringByUnescapingHTML Which returns span Foo span Hopefully unescaping all other HTML entities as well and even ASCII codes like Ӓ and the like...

Property vs. instance variable

http://stackoverflow.com/questions/719788/property-vs-instance-variable

to use the memory management inherited by a synthesized property I'd use something such as myVar @ Foo The other way would be referencing it via self. ivar property here . The problem with using the @synthesize..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject NSNumber bar @property readwrite retain NSNumber bar @end @implementation Foo @synthesize bar void baz NSNumber numberOne NSNumber numberWithInt 1 Both.. message passing syntax makes intent more explicit IMO. @interface Foo NSObject NSNumber bar @property readwrite retain NSNumber bar @end @implementation Foo @synthesize bar void baz NSNumber numberOne NSNumber numberWithInt 1 Both set the value of bar through either the your custom or the synthesized setter method self..

Create singleton using GCD's dispatch_once in Objective C

http://stackoverflow.com/questions/5720029/create-singleton-using-gcds-dispatch-once-in-objective-c

Instance variables with underscore in Objective-C 2.0 and renaming with @synthetize leads to optimization warnings by the 'Analyze' tool of Xcode 4 [duplicate]

http://stackoverflow.com/questions/6124109/instance-variables-with-underscore-in-objective-c-2-0-and-renaming-with-synthet

naming as shown by sebnow in his following answer instance variable method argument naming in Objective C I copy paste his example code here @interface Foo NSObject id _bar @property nonatomic retain id bar id initWithBar id aBar @end @implementation Foo @synthesize bar _bar id initWithBar id aBar self super init if.. Objective C I copy paste his example code here @interface Foo NSObject id _bar @property nonatomic retain id bar id initWithBar id aBar @end @implementation Foo @synthesize bar _bar id initWithBar id aBar self super init if self nil _bar aBar return self @end In the implementation of some methods of the Foo class I use.. Foo @synthesize bar _bar id initWithBar id aBar self super init if self nil _bar aBar return self @end In the implementation of some methods of the Foo class I use for example _bar aBar instead of using bar aBar The 'Analyse' tool introduced by Xcode 4 gives me this warning I'm using version 4.0.2 Instance variable..

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

Objective C HTML escape/unescape

http://stackoverflow.com/questions/659602/objective-c-html-escape-unescape

if there is an easy way to do a simple HTML escape unescape in Objective C. What I want is something like this psuedo code NSString string @ lt span gt Foo lt span gt string stringByUnescapingHTML Which returns span Foo span Hopefully unescaping all other HTML entities as well and even ASCII codes like Ӓ and the.. in Objective C. What I want is something like this psuedo code NSString string @ lt span gt Foo lt span gt string stringByUnescapingHTML Which returns span Foo span Hopefully unescaping all other HTML entities as well and even ASCII codes like Ӓ and the like. Is there any methods in Cocoa Touch UIKit to do this iphone..

Property vs. instance variable

http://stackoverflow.com/questions/719788/property-vs-instance-variable

the difference between an ivar and property. So if I want to use the memory management inherited by a synthesized property I'd use something such as myVar @ Foo The other way would be referencing it via self. ivar property here . The problem with using the @synthesize myVar _myVar strategy is I figured that writing code..

Preventing a UITabBar from applying a gradient to its icon images

http://stackoverflow.com/questions/1355480/preventing-a-uitabbar-from-applying-a-gradient-to-its-icon-images

Here's how to do a completely custom tab bar custom icons UITabBarItem item UITabBarItem alloc init item.title @ foo setting custom images prevents the OS from applying a tint color item setFinishedSelectedImage UIImage imageNamed @ tab1_active.png..

iPhone - dealloc - Release vs. nil

http://stackoverflow.com/questions/1458178/iphone-dealloc-release-vs-nil

memory management release management dealloc share improve this question What you have seen is probably these 1 foo release 2 self.bar nil 3 baz nil Is releasing the object accessing it through the instance variable foo . The instance variable.. these 1 foo release 2 self.bar nil 3 baz nil Is releasing the object accessing it through the instance variable foo . The instance variable will become a dangling pointer. This is the preferred method in dealloc. Is assigning nil to a property..

Adding C++ Object to Objective-C Class

http://stackoverflow.com/questions/2262011/adding-c-object-to-objective-c-class

throwing an exception in objective-c/cocoa

http://stackoverflow.com/questions/324284/throwing-an-exception-in-objective-c-cocoa

UIImageView Gestures (Zoom, Rotate) Question

http://stackoverflow.com/questions/3448614/uiimageview-gestures-zoom-rotate-question

B. I would like to combine the zoom operation with rotation and I don't know ho to implement this void viewDidLoad foo UIImageView alloc initWithFrame CGRectMake 100.0 100.0 600 800.0 foo.userInteractionEnabled YES foo.multipleTouchEnabled.. don't know ho to implement this void viewDidLoad foo UIImageView alloc initWithFrame CGRectMake 100.0 100.0 600 800.0 foo.userInteractionEnabled YES foo.multipleTouchEnabled YES foo.image UIImage imageNamed @ earth.jpg foo.contentMode UIViewContentModeScaleAspectFit.. void viewDidLoad foo UIImageView alloc initWithFrame CGRectMake 100.0 100.0 600 800.0 foo.userInteractionEnabled YES foo.multipleTouchEnabled YES foo.image UIImage imageNamed @ earth.jpg foo.contentMode UIViewContentModeScaleAspectFit foo.clipsToBounds..

Difference between self.ivar and ivar?

http://stackoverflow.com/questions/4142177/difference-between-self-ivar-and-ivar

uses the accessor and or mutator defined by you this is nonatomic and retain in your case . So when you call self.name foo it will call the setName NSString str mutator generated by the compiler which will first release the current string then.. release the current string then retains the new string and finally sets name to the retained string. Just calling name foo does nothing more than assigning name to foo. This also means that you can only call self.xxx when you have defined a property.. string and finally sets name to the retained string. Just calling name foo does nothing more than assigning name to foo. This also means that you can only call self.xxx when you have defined a property for the ivar otherwise the compiler will..

Remove whitespace from string in Objective-C

http://stackoverflow.com/questions/4645649/remove-whitespace-from-string-in-objective-c

NSCharacterSet set . You should use NSCharacterSet whitespaceCharacterSet as parameter NSString foo @ untrimmed string NSString trimmed foo stringByTrimmingCharactersInSet NSCharacterSet whitespaceCharacterSet share improve..

Getting a list of files in a directory with a glob

http://stackoverflow.com/questions/499673/getting-a-list-of-files-in-a-directory-with-a-glob

stripping out the stuff I don't want which sucks. But what I'd really like is to be able to search for something like foo .jpg instead of asking for the entire directory but I've not been able to find anything like that. So how the heck do you..

Why tack a protocol of NSObject to a protocol implementation

http://stackoverflow.com/questions/679822/why-tack-a-protocol-of-nsobject-to-a-protocol-implementation

conforms to the NSObject protocol Isn't that rather redundant in that if you do something such as id MyProtocol foo foo here conforms to NSObject AND MyProtocol Just curious what the logic is. iphone objective c cocoa share improve this.. conforms to the NSObject protocol Isn't that rather redundant in that if you do something such as id MyProtocol foo foo here conforms to NSObject AND MyProtocol Just curious what the logic is. iphone objective c cocoa share improve this..

ObjectiveC ivars or @property

http://stackoverflow.com/questions/6942439/objectivec-ivars-or-property

Replace multiple characters in a string in Objective-C?

http://stackoverflow.com/questions/713918/replace-multiple-characters-in-a-string-in-objective-c

objective c string replacement share improve this question A somewhat inefficient way of doing this NSString s @ foo bar baz.foo NSCharacterSet doNotWant NSCharacterSet characterSetWithCharactersInString @ . s s componentsSeparatedByCharactersInSet.. c string replacement share improve this question A somewhat inefficient way of doing this NSString s @ foo bar baz.foo NSCharacterSet doNotWant NSCharacterSet characterSetWithCharactersInString @ . s s componentsSeparatedByCharactersInSet.. @ . s s componentsSeparatedByCharactersInSet doNotWant componentsJoinedByString @ NSLog @ @ s foobarbazfoo Look at NSScanner and NSString rangeOfCharacterFromSet ... if you want to do this a bit more efficiently. share..

UIButton in UITableView cell like “Delete Event”

http://stackoverflow.com/questions/1076785/uibutton-in-uitableview-cell-like-delete-event

UIButton buttonWithType UIButtonTypeInfoDark button setBackgroundColor UIColor redColor button.titleLabel.text @ Foo Bar cell.contentView addSubview button which produces a button indeed. It doesn't look yet how it's supposed to it's obvious..

NSManagedObjectContext performBlockAndWait: doesn't execute on background thread?

http://stackoverflow.com/questions/11831946/nsmanagedobjectcontext-performblockandwait-doesnt-execute-on-background-thread

will always enqueue the block onto the queue of the receiving MOC and then return immediately. Thus moc performBlock ^ Foo moc performBlock ^ Bar will place two blocks on the queue for moc. They will always execute asynchronously. Some unknown..

UIToolbar UIBarButtonItem with both image and title has very dim text

http://stackoverflow.com/questions/1533238/uitoolbar-uibarbuttonitem-with-both-image-and-title-has-very-dim-text

imageNamed @ foo.png style UIBarButtonItemStylePlain target self action @selector fooButtonPressed fooButton.title @ Foo The title's text displays very dim it looks like it has an alpha of about 0.5. If I use the default UIToolBar barStyle I..

Keep iPhone UIButton Highlighted

http://stackoverflow.com/questions/2290534/keep-iphone-uibutton-highlighted

iPhone UIButton Highlighted I have the following code snippets @interface Foo UIViewController ... UIButton myButton ... @implementation Foo void viewDidLoad ... myButton.highlighted YES ... When I.. I have the following code snippets @interface Foo UIViewController ... UIButton myButton ... @implementation Foo void viewDidLoad ... myButton.highlighted YES ... When I run the app the button is highlighted in blue default behavior..

How to identify WHICH NSURLConnection did finish loading when there are multiple ones?

http://stackoverflow.com/questions/2476302/how-to-identify-which-nsurlconnection-did-finish-loading-when-there-are-multiple

these to the connection parameter in connection didReceiveData and connectiondidFinishLoading For example @interface Foo NSObject NSURLConnection connection1 NSURLConnection connection2 and connection1 NSURLConnection connectionWithRequest request1..

Core Data: Error, “Can't Merge Models With Two Different Entities Named 'foo' ”

http://stackoverflow.com/questions/3205783/core-data-error-cant-merge-models-with-two-different-entities-named-foo

if managedObjectModel nil return managedObjectModel NSString path NSBundle mainBundle pathForResource @ Foo ofType @ momd NSURL momURL NSURL fileURLWithPath path managedObjectModel NSManagedObjectModel alloc initWithContentsOfURL.. path managedObjectModel NSManagedObjectModel alloc initWithContentsOfURL momURL return managedObjectModel where 'Foo' is the name of your data model. Hopefully this is useful to someone I spent WAY too many hours beating my head against..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

does make it more possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject NSNumber bar @property readwrite retain NSNumber bar @end @implementation Foo @synthesize bar void baz NSNumber.. more explicit IMO. @interface Foo NSObject NSNumber bar @property readwrite retain NSNumber bar @end @implementation Foo @synthesize bar void baz NSNumber numberOne NSNumber numberWithInt 1 Both set the value of bar through either the your custom..

Create singleton using GCD's dispatch_once in Objective C

http://stackoverflow.com/questions/5720029/create-singleton-using-gcds-dispatch-once-in-objective-c

Instance variables with underscore in Objective-C 2.0 and renaming with @synthetize leads to optimization warnings by the 'Analyze' tool of Xcode 4 [duplicate]

http://stackoverflow.com/questions/6124109/instance-variables-with-underscore-in-objective-c-2-0-and-renaming-with-synthet

following answer instance variable method argument naming in Objective C I copy paste his example code here @interface Foo NSObject id _bar @property nonatomic retain id bar id initWithBar id aBar @end @implementation Foo @synthesize bar _bar.. here @interface Foo NSObject id _bar @property nonatomic retain id bar id initWithBar id aBar @end @implementation Foo @synthesize bar _bar id initWithBar id aBar self super init if self nil _bar aBar return self @end In the implementation.. id aBar self super init if self nil _bar aBar return self @end In the implementation of some methods of the Foo class I use for example _bar aBar instead of using bar aBar The 'Analyse' tool introduced by Xcode 4 gives me this warning..

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

Objective C HTML escape/unescape

http://stackoverflow.com/questions/659602/objective-c-html-escape-unescape

HTML escape unescape in Objective C. What I want is something like this psuedo code NSString string @ lt span gt Foo lt span gt string stringByUnescapingHTML Which returns span Foo span Hopefully unescaping all other HTML entities as well.. like this psuedo code NSString string @ lt span gt Foo lt span gt string stringByUnescapingHTML Which returns span Foo span Hopefully unescaping all other HTML entities as well and even ASCII codes like Ӓ and the like. Is there any methods..

Custom UISwitch & App Store approval

http://stackoverflow.com/questions/694848/custom-uiswitch-app-store-approval

alloc initWithFrame CGRectZero switchView setCenter CGPointMake 160.0f 260.0f switchView setLeftLabelText @ Foo switchView setRightLabelText @ Bar switchView rightLabel setFont UIFont fontWithName @ Georgia size 16.0f switchView leftLabel..

Property vs. instance variable

http://stackoverflow.com/questions/719788/property-vs-instance-variable

So if I want to use the memory management inherited by a synthesized property I'd use something such as myVar @ Foo The other way would be referencing it via self. ivar property here . The problem with using the @synthesize myVar _myVar..