Recent questions tagged Cocoa

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cocoa - Storing CLLocationCoordinates2D in NSMutableArray

After some searching, I got the following solution : reference. CLLocationCoordinate2D* new_coordinate = malloc(sizeof( ... Objective C newbie. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa - init and awakeFromNib

I'd like understand why if i try to set value (I.e. setAlphaValue or setTitle) for an object (like a NSButton) in ... :@"My title"]; } } @end See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa - Swift NSImage to CGImage

How can I convert a NSImage to CGImage in Swift? In Objective-C I did it like this: - (CGImageRef)CGImage { ... at the line let maskRef ... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa - How to create an overlay window in Java?

I'm trying to create a HUD style display for a foreign application. To do this, I'd need to make a ... through Cocoa (Rococoa) or Carbon. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa - How to determine whether an NSSearchField/NSTextField has input focus?

How can I determine whether an NSSearchField/NSTextField has input focus? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa - NSPasteboard and simple custom data

I'm having a really difficult time trying to get NSPasteboard to work, so forgive me for my lack of ... me with my dragging operations. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa touch - Does Interface Builder use the -init method to initialize view controllers?

I have setup tab bar controller using interface builder, and each tab bar item is linked to a view controller ( ... of memory warning. Any idea? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa - Objective-C Enumeration, NS_ENUM & NS_OPTIONS

What's the correct way to create an enumeration with a specific type in Objective-C? How does NS_ENUM and ... _type _name; enum : _type See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa touch - What's the height of a UITabBar on iOS 8, iOS 9, iOS 10, and iOS 11?

The height of the UITabBar seems to have changed between iOS 7 and 8/9/10/11. I'm posting this question for ... 9/10/11 on iPhone and iPad? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa - Core Text's CTFramesetterSuggestFrameSizeWithConstraints() returns incorrect size every time

According to the docs, CTFramesetterSuggestFrameSizeWithConstraints () "determines the frame size needed for a string range" ... x 31.000000 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa - How to change the height of an NSWindow titlebar?

I want to change the height of an NSWindow titlebar. Here are some examples: And I could use an NSToolbar, ... movable. Have you any ideas? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa - How do I draw the desktop on Mac OS X?

I want to draw the desktop on Mac OS X (Snow Leopard). Specifically, I want to achieve the same effect as ... desktop background, that is OK. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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614 views

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cocoa - What's the difference between a CoreAnimation Layer Backed View and a Layer Hosting View?

What is the difference between a Layer Backed View and a Layer Hosting View in Core Animation? What are the ... appropriate to use either type? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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708 views

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cocoa touch - Does UIActivityIndicator require manual threading on iPhone

I am running creating an iPhone application which performs a costly operation and I wanted to create an ... this kind of behavior? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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585 views

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cocoa - How do I find all the property keys of a KVC compliant Objective-C object?

Is there a method that returns all the keys for an object conforming to the NSKeyValueCoding protocol? Something along ... so far. Thanks, G. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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597 views

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cocoa - How to redirect the nslog output to file instead of console

I have cocoa application running on OS X. I have used NSLog for debugging purpose. Now I want to redirect the ... console but only in file ?? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa touch - How to Convert UIImage to CIImage and vice versa

I'm trying to get CIImage from ImageView that display on the screen. UIImage *image = myImageView.image; convert image ... .]; How to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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551 views

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cocoa touch - Lua on the iPhone?

I am trying to use Lua on the iPhone. On Mac OS X, in a normal (non-iOS) Cocoa application, I used the following ... app if it has Lua in it.) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa touch - Navigation bar has wrong position when modal a view controller with flip horizontal transition in iOS 7

When I am trying to modal a view controller with flip horizontal transition in iOS7, the origin of navigation ... Any help will be appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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737 views

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cocoa - What is the difference between NIB and XIB Interface Builder file formats?

What is difference between nib and xib in Interface Builder files? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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603 views

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cocoa touch - Get underlying NSData from UIImage

I can create UIImage from NSData using [UIImage imageWithData:] or [UIImage initWithData:] methods. I wonder if ... myData = [myImage getData]; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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468 views

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cocoa touch - iPhone Development Environment (from scratch)

I've developed on Windows and .NET for my whole career so forgive my ignorance on this one. What would be the ... Windows that's fine. Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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644 views

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cocoa - Lock screen by API in macOS

Is there an API, that can lock the screen as the menu bar entry you can add from Keychain preferences? This ... bringing the system to sleep. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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678 views

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cocoa - Detecting screen recording settings on macOS Catalina

What's is a reliable way to detect if user has enabled this API? CGWindowListCreateImage returns a valid object even if ... { return YES; } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cocoa - Google App Engine with ClientLogin Interface for Objective-C

I'm experiencing the same problem in this previous stackoverflow.com post. Specifically, I seem to be able to ... for Google App Engine code. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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668 views

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cocoa touch - UILabel UITextField UITextView

What's the fundamental difference between them? Is a UITextField that's not editable is effectively a UILabel? Are those essentially the same? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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413 views

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cocoa - Profiling Objective-C binary image size

I'm looking for tools and approaches to determining what parts of of my Cocoa and Cocoa-Touch ... without undermining code maintainability? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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531 views

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cocoa touch - Is it necessary to use weak references to self always inside blocks..?

I am getting confused with use of self inside blocks, I go through some of Apple's documents but still cannot find ... ? **I am using ARC See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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