Recent questions tagged objective

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objective c - Duplicating subviews(UIButton and UIImageView) of UITableViewCell contentView on scrolling

In my tableView, in some cells i have added an imageView as subview of cell contentView. On scrolling tableView up ... :pendImage]; } } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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539 views

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objective c - Why is 'no known method for selector x' a hard error under ARC?

Maybe it's useful if calling a method that MyClass doesn't understand on a something typed MyClass is an ... just being a bit inconsistent? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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301 views

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objective c - Converting NSString to Base64 Data for XML Serialization

I use Apple's NSXMLParser class to load data. I have a separate framework for serializing my data. I've had ... persisted in my XML files. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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388 views

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objective c - Why do argument lists in certain Cocoa methods end with a nil?

Why do argument list in some methods end with nil? I have noticed this particularly in the collection classes, for ... , @"value3", nil]; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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387 views

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objective c - NSStrikethroughStyleAttributeName , How to strike out the string in iOS 10.3?

I have used this line of code before release of iOS 10.3 ,and worked fine. NSMutableAttributedString *attributeString = ... do the strike out ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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481 views

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objective c - Type 'Boolean' does not conform to protocol 'BooleanType'

In attempting to create a Launch Helper as per the Apple docs (and tutorial-ized), I seem to be hitting a ... to 'Bool' ...seriously? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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434 views

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objective c - Concatenate int and string

How can I concatenate an int (e.g: 4) and a string (e.g: @"/12") for printing? I'm okay with casting the ... add @"/12" after the int's value. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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306 views

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objective c - Use of GL_STENCIL_TEST to render concave polygons

I'm working on a custom geometry library adapted to Quartz Composer and trying to draw some concave polygons in ... with the stencil buffer. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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473 views

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objective c - Force controllers to Change their orientation in Either Portrait or Landscape

I have following Controllers, (I have selected all types orientation modes in iPad) Here is my iPad Storyboard ... MainController. Why is that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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408 views

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objective c - NSPredicate With FUNCTION Not Working

My predicate keeps on crashing my app with the message Unsupported function expression FUNCTION(SELF, " ... doubleValue]; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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336 views

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objective c - Converting mutliple date format into a single format in iPhone

I generate a PDF from html source code. I read all the text line by line. I need to get all the dates from whole ... === > %@",myDateStr); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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388 views

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objective c - How to add properties to NSMutableArray via category extension?

I know that I can "subclass" an NSMutableArray using "category extensions," i.e. @interface NSMutableArray ( ... properties to the extension? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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583 views

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objective c - Use Singleton In Interface Builder?

I have a Singleton set up like this: static Universe *instance; + (Universe *)instance { return instance; ... in the +initialize method. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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422 views

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objective c - Fast Enumeration on NSArray of Different Types

I have this question here (as well other quesrtions on SO), and the Apple docs about Objective-C collections ... the loop encounters that item? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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375 views

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objective c - What kind of object does @[obj1, obj2] create?

I came across the following: NSArray *array = @[object1, object2]; It seems to be creating an NSArray, but is ... object, or must I release it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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310 views

1 answer

objective c - Forcing UIInterfaceOrientation changes on iPhone

I'm strugging with getting an iPhone application which requires just about every push or pop in the Nav Controller Stack ... to go (please no!) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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483 views

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objective c - Facebook, Twitter icon not showing in UIActivityViewController on iOS7

I have added this code for presenting a UIActivityViewController: -(IBAction)activityAction:(id)sender { ... I solve this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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571 views

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objective c - isValidJSONObject not working as expected

After testing, I can only get [NSJSONSerialization isValidJSONObject:] to return a positive on JSON data that I have ... to work as expected? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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535 views

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objective c - MKPinAnnotationView custom Image is replaced by pin with animating drop

I'm displaying user avatar images on a MapView. The avatars appear to be working if they are rendered without ... 3.0; return pinView; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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491 views

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objective c - How to identify timezone from longitude and latitude in iOS

How can I find out which NSTimeZone a given longitude and latitude fall in? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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673 views

1 answer

objective c - How to change NSTextField background color in NSPopOver

Mac OSX 10.10 Xcode 6.1 I created a tableview in NSPopOver. I try to change textfield's background ... textfields background color to white? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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530 views

1 answer

objective c - Bitcode signature failure in Xcode

I updated Xcode to the last version, and now when I'm trying to compile the project I'm getting an error ... , everything is fine with it. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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480 views

1 answer

objective c - Hide Red Recording Status Bar In iOS App When Not Recording

I can't get the red "Recording" status bar to hide in my app when the app is in the background and not ... don't know what it could be. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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285 views

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objective c - What determines the presence of the iPhone Location Services icon in the status bar?

Here's my situation. I'm developing an iPhone application that uses Core Location to determine the device's location. ... as to the real issue. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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476 views

1 answer

objective c - Google Maps URL scheme not working on iOS 9

The following URL scheme was working on previous version but doesn't work anymore on iOS 9: comgooglemaps://?q ... other apps using URL schemes? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

488 views

1 answer

objective c - How to achieve trackball and access label above Bar on Bar charts in Swift 3x

Hello Developers I am working on project where I have used danielgindi/Charts a third party library now the challenge here is ... .0) like "E"?? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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371 views

1 answer

objective c - iOS Custom Annotation: A view below the annotation pin

I need to replace the default annotation view with my custom annotation view. I need the do following things ... help will be highly appreciated See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

548 views

1 answer

objective c - iOS 10 - App crashes To access photo library or device camera via UIImagePickerController

Below is my code to access photo library -(void)click_gallery { if([UIImagePickerController isSourceTypeAvailable: ... Thanks in Advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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