Recent questions tagged objective

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objective c - Unable to set frame correctly before viewDidAppear

I was wondering if anyone knows why when you set the frame of a subview in viewDidLoad and ... frame = table2LocationWithHeader; } See Question&Answers more detail:os...

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

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401 views

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objective c - IBOutletCollection set ordering in Interface Builder

I am using IBOutletCollections to group several Instances of similar UI Elements. In particular I group a number ... set the correct ordering. See Question&Answers more detail:os...

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

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466 views

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objective c - Utilizing C++ in iOS and Mac OS X applications

I'm somewhat moderate in my C++ knowledge but know next to nothing regarding Objective-C. I am planning (and even ... I am unsure of the degree. See Question&Answers more detail:os...

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

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638 views

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objective c blocks - How to cancel NSBlockOperation

I have a long running loop I want to run in the background with an NSOperation. I'd like to use a block: ... no way to cancel block operations? See Question&Answers more detail:os...

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

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376 views

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objective c - Upload image to the PHP server from iOS

I know this question has been asked earlier as well but my issue is a bit different. I want to upload an ... service call. 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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579 views

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objective c - How does Apple update the Airport menu while it is open? (How to change NSMenu when it is already open)

I've got a statusbar item that pops open an NSMenu, and I have a delegate set and it's hooked up correctly ... -while the menu is open-. See Question&Answers more detail:os...

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

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objective c - Restore pre-iOS7 UINavigationController pushViewController animation

So. Just started transitioning my IOS code to IOS7, and ran into a bit of problem. I've got a ... ; Does anyone have any clue? 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 - accessing a file using [NSBundle mainBundle] pathForResource: ofType:inDirectory:

I have a file paylines.txt added inside the folder named TextFiles which resides inside the Resources folder of my ... 207] the string (null) See Question&Answers more detail:os...

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

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330 views

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objective c - Mix video with static image in CALayer using AVVideoCompositionCoreAnimationTool

I am trying to mix video, coming from the camera with a static image (watermarking). I have checked around questions/ ... ; break; } }]; } See Question&Answers more detail:os...

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

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365 views

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objective c - Getting text from image on ios (image processing)

I am thinking of making an application that requires extracting TEXT from an image. I haven't done any thing ... idea on this. Thanks, Vikram See Question&Answers more detail:os...

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

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859 views

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objective c - How to generate UUID in ios

How to get a UUID in objective c, like in Java UUID is used to generate unique random numbers which represents 128 bit 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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362 views

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objective c - Is it necessary to assign a string to a variable before comparing it to another?

I want to compare the value of an NSString to the string "Wrong". Here is my code: NSString *wrongTxt = [[ ... the label value to a string? See Question&Answers more detail:os...

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

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414 views

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objective c - UIScrollview with UIButtons - how to recreate springboard?

I'm trying to create a springboard-like interface within my app. I'm trying to use UIButtons added to a ... btn release]; [scrollView release]; See Question&Answers more detail:os...

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

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495 views

1 answer

objective c - How to get the file size given a path?

I have a path to file contained in an NSString. Is there a method to get its file size? See Question&Answers more detail:os...

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

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488 views

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objective c - What is the difference between a __weak and a __block reference?

I'm reading Xcode's documentation, and here is something that puzzles me: __block typeof(self) tmpSelf = self; [ ... So, I'm totally puzzled. See Question&Answers more detail:os...

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

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457 views

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objective c - iPhone: Setting Navigation Bar Title

Hey all. I'm still pretty new to iPhone development, and I'm having a bit of trouble figuring out how to ... to get it happening right? 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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625 views

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objective c - How do I change the color of the text in a UIPickerView under iOS 7?

I'm aware of the pickerView:viewForRow:forComponent:reusingView method, but when using the view it passes in ... views show up anymore. See Question&Answers more detail:os...

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

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331 views

1 answer

objective c - Downloading multiple files in batches in iOS

I have an app that right now needs to download hundreds of small PDF's based on the users selection. The problem ... will have to build my self? See Question&Answers more detail:os...

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

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554 views

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objective c - Getting the visible rect of an UIScrollView's content

How can I go about finding out the rect (CGRect) of the content of a displayed view that is actually visible on screen ... .5, it'll be double.) See Question&Answers more detail:os...

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

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413 views

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objective c - What is the simplest implementation of Markdown for a Cocoa application?

I'm writing a Cocoa application in Objective-C, and I would like to be able to incorporate Markdown. ... preview that would require threading. See Question&Answers more detail:os...

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

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552 views

1 answer

objective c - Dark shadow on navigation bar during segue transition after upgrading to Xcode 5.1 and iOS 7.1

When I am navigating back & forth between parent and child controllers in a master - detail navigation controller, i see ... I get rid of 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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470 views

1 answer

objective c - When do I need to call setNeedsDisplay in iOS?

When creating an iOS app, I'm confused as to when exactly I need to call setNeedsDisplay? I know that it ... regarding when to use this 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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505 views

1 answer

objective c - Send notification to Mountain lion notification center

Can someone give an example of sending a test notification from a Cocoa app to Notifications Center? eg. when I click on an NSButton See Question&Answers more detail:os...

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

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361 views

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objective c - Getting reference to the top-most view/window in iOS application

I'm creating a reusable framework for displaying notifications in an iOS application. I'd like the notification views ... to get the top view? See Question&Answers more detail:os...

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

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511 views

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objective c - iOS ScrollView needs constraint for y position or height

-ViewController --View ---ScrollView (Top,Bottom,Leading,Trailing spaces to superview set to 0) ----ContentView ... height the content needs? See Question&Answers more detail:os...

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

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467 views

1 answer

objective c - How to visually create and use static cells in a UITableView embedded in a UIViewController

I'm using XCode 4.2 and have built my UI using Storyboards. I need to create a view that has ... Any assistance would be greatly appreciated. See Question&Answers more detail:os...

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

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436 views

1 answer

objective c - Save Photos to Custom Album in iPhones Photo Library

I'm trying to create a custom album in the Photo Library of an iPhone and then save photos that I've taken with the ... 3.2, IOS 5.1, and ARC See Question&Answers more detail:os...

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

0 votes

370 views

1 answer

objective c - iOS 7 round framed button

the iOS App Store has a blue round framed button for buying/downloading apps. In my App you can download ... 99" How is this possible? See Question&Answers more detail:os...

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

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