Recent questions tagged cocoa

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cocoa - Properties and Instance Variables in Objective-C

I'm rather confused about properties and instance variables in Objective-C. I'm about half-way through Aaron ... within your own class? See Question&Answers more detail:os...

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

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cocoa touch - Programmatically send to front/back elements created from interface builder

In interface builder, there are layout options to send to back or send to front any elements such as UIButton, ... just update the z-axis. See Question&Answers more detail:os...

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

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cocoa - How do I copy or move an NSManagedObject from one context to another?

I have what I assume is a fairly standard setup, with one scratchpad MOC which is never saved (containing a bunch ... ) Is there a better way? See Question&Answers more detail:os...

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

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cocoa touch - eraser not working in iOS drawing

I am working on a drawing project, where I have an eraser option. The code given below is for when I start ... doing it right. Regards, Ranjit See Question&Answers more detail:os...

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

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cocoa touch - Does Objective-C support Generics?

I wonder whether Objective-C offers any support for generics? For instance, consider a method: -(void) sort: ( ... Card *>) deck { } See Question&Answers more detail:os...

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

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cocoa - Most effective way to do networking on Mac/iPhone?

What would be the most effective way (that is, best ratio of effort vs readability and maintainability) to establish ... it did under the hood. See Question&Answers more detail:os...

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

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cocoa - How to detect keystrokes globally in Swift on macOS?

Here is what I tried: NSEvent.addGlobalMonitorForEvents(matching: [.keyDown]) { (event) in print(event.keyCode ... question is about keystrokes. See Question&Answers more detail:os...

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

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cocoa - How to use NSTask as root?

In an application I'm making I need to run the following command as root (user will be prompted trice if they ... help me with this? Thanks. See Question&Answers more detail:os...

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

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cocoa - Why NSWindow without styleMask:NSTitledWindowMask can not be keyWindow?

Problem: I have one window mainWindow and another childWindow added to mainWindow. childWindow is kind of WindowExt ... 't become keyWindow. See Question&Answers more detail:os...

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

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cocoa - Get NSTextField contents to scale

How can I have the text scale to fit the bounds I gave 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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cocoa - How to add NSDebug.h and use NSZombie in iPhone SDK

I want to enable NSZombies for my iPhone app. I have read several articles online and I am still ... = YES MallocStackLoggingNoCompact = YES See Question&Answers more detail:os...

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

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cocoa - How to add NSDebug.h and use NSZombie in iPhone SDK

I want to enable NSZombies for my iPhone app. I have read several articles online and I am still ... = YES MallocStackLoggingNoCompact = YES See Question&Answers more detail:os...

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

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cocoa - Best way to do interprocess communication on Mac OS X

I'm looking at building a Cocoa application on the Mac with a back-end daemon process (really just a mostly- ... of resources on this topic. See Question&Answers more detail:os...

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

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650 views

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cocoa - Programmatically check if a process is running on Mac

Is there any Carbon/Cocoa/C API available on Macs that I can use to enumerate processes? I'm looking for ... running (by name). Thanks! See Question&Answers more detail:os...

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

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cocoa touch - Accurate timing in iOS

I am looking at the 'Metronome' sample code from the iOS SDK (http://developer.apple.com/library/ios/ ... severe then on the simulator. 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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cocoa touch - is it possible to save NSMutableArray or NSDictionary data as file in iOS?

I want to save an NSMutableArray or NSDictionary as a permanent file. Then, I would like to reopen the file later. Is ... so, how can I do 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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cocoa touch - Couldn't UIToolBar be transparent?

I try the following code, but it doesn't work. [helloToolbar setBackgroundColor:[UIColor clearColor]]; See Question&Answers more detail:os...

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

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458 views

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cocoa - Observe a File or Folder in Objective-C

What is the best way to listen to a folder or file to see if it has been saved or if a new file has been added? See Question&Answers more detail:os...

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

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440 views

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cocoa touch - Objective-C Difference between setting nil and releasing

I've learned that in dealloc you do [object release]; but in viewDidUnload (in a UIViewController subclass) you ... reference count is 0 right? See Question&Answers more detail:os...

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

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536 views

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cocoa - How to let NSTextField grow with the text in auto layout?

Auto layout in Lion should make it fairly simple to let a text field (and hence a label) grow with text it ... and reliable way to do 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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501 views

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cocoa touch - How can I set a button background color on iPhone?

How can I set a custom background color of a button? Interface Builder doesn't seem to have an interface to ... you provide an example, please? See Question&Answers more detail:os...

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

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398 views

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cocoa touch - Optimizing CLLocationManager/CoreLocation to retrieve data points faster on the iPhone

I'm currently using CoreLocation + CLLocationManager in order to compare a users current location to N amount of other ... to speed this up. See Question&Answers more detail:os...

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

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445 views

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cocoa touch - How is a rounded rect view with transparency done on iphone?

A lot of apps pop up a transparent view with rounded corners and an activityIndicator when running a time consuming ... seems to get ignored). See Question&Answers more detail:os...

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

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559 views

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cocoa - How can I set the icon for a Mac Application in Xcode?

I have been learning a lot about writing Objective-C code and designing in Interface Builder and I wanted to set ... . Thank you 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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cocoa touch - Can I pass a block as a @selector with Objective-C?

Is it possible to pass an Objective-C block for the @selector argument in a UIButton? ... forControlEvents:UIControlEventTouchUpInside]; Thanks See Question&Answers more detail:os...

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

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596 views

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cocoa - using dispatch_sync in Grand Central Dispatch

Can anyone explain with really clear use cases what the purpose of dispatch_sync in GCD is for? I can't understand ... have to use this. Thanks! See Question&Answers more detail:os...

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

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505 views

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cocoa - What is the best way to unit test Objective-C code?

What frameworks exist to unit test Objective-C code? I would like a framework that integrates nicely with Apple Xcode. See Question&Answers more detail:os...

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

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cocoa touch - Return a list of running background apps/processes in iOS

I'm working on a jailbreak app, and want to send SIGKILL messages to specific apps that may be running on a ... all can give, you're wonderful! See Question&Answers more detail:os...

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

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