Recent questions tagged iPhone

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iphone - How to save the date and time when a Core Data object is created

I want to save & retrive current time (if today) or date of the note created in Core Data Please guide me on how I can 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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305 views

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iphone - Is it possible to render AVCaptureVideoPreviewLayer in a graphics context?

This seems like a simple task, yet it is driving me nuts. Is it possible to convert a UIView containing ... I cannot make it work. See Question&Answers more detail:os...

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

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361 views

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iphone - How to auto scroll UIScrollView using timer?

I have a UIScrollView to show images. I need a timer to show the images one after another, after every 5 ... after 5 seconds using the timer? See Question&Answers more detail:os...

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

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282 views

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iphone - UIView Autoresizing Resources

I've been working on autoresizing a custom UIView and Apple has very little to say on this. What's ... available in the SDK programmatically. See Question&Answers more detail:os...

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

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276 views

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iphone - Removing a specific entry/row from Core-Data

I'm using core data in my app, and i'm confused when it comes to removing certain rows or entries from the ... one out. Thanks for any help. See Question&Answers more detail:os...

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

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672 views

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iphone - How can we hide the tableHeaderView and tableFooterView?

I have two buttons which i add it in one in table-footer and other one in table-header,i know how to hide ... Please help me. Thanks in advance. See Question&Answers more detail:os...

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

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316 views

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iphone - error: expected specifier-qualifier-list before...in Objective C?

Whenever I build the following code, I get the error above. //Controller.h #import <UIKit/UIKit.h> ... Controller @end Can anyone explain? See Question&Answers more detail:os...

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

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415 views

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iphone - Disadvantage of using NSMutableArray vs NSArray?

I'm using an array to store cached objects loaded from a database in my iPhone app, and was wondering: are ... whether it's significant or not. See Question&Answers more detail:os...

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

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380 views

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iphone - Best time to invalidate NSTimer inside UIViewController to avoid retain cycle

Does any one know when is the best time to stop an NSTimer that is held reference inside of a ... problem). Any good suggestions? See Question&Answers more detail:os...

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

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330 views

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iphone - UICollectionView: One Row or Column

I want to use UICollectionView to display a horizontal scrollable list of thumbnails, however, I want this to be ... display one row or column? See Question&Answers more detail:os...

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

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365 views

1 answer

iphone - How to get UITextView to respect newlines in Interface Builder?

I have a simple app with a UITextView embedded into a UIScrollView. Interface Builder won't let me add ... to accept newlines for spacing? See Question&Answers more detail:os...

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

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282 views

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iphone - How to delete ALL FILES in a specified directory on the app?

Given a directory [[self documentsDirectory] stringByAppendingPathComponent:@"Photos/"] how do I delete ALL FILES ... documents directory path) See Question&Answers more detail:os...

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

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267 views

1 answer

iphone - Get the extension of a file contained in an NSString

I have an NSMutable dictionary that contains file IDs and their filename+extension in the simple form of fileone.doc or ... will be. Thank you. See Question&Answers more detail:os...

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

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535 views

1 answer

iphone - Setting A CGContext Transparent Background

I am still struggling with drawing a line with CGContext. I have actually go to line to draw, but now I ... (context); } 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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315 views

1 answer

iphone - SenTestCase in Xcode 3.2 and XCBuildLogCommandInvocationSection Errors

I have a set of SenTestCase that are causing issues in XCode 3.2.4. When attempting to compile (with a very ... Test Bundle'. Any ideas? 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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318 views

1 answer

iphone - How do I stack images to simulate depth using Core Animation?

I have a series of UIImages with which I need to simulate depth. I can't use scaling because I need to be able ... for what I'm trying to do. See Question&Answers more detail:os...

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

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254 views

1 answer

iphone - tabBarController and navigationControllers in landscape mode, episode II

I have a UITabBarController, and each tab handles a different UIViewController that pushes on the stack new ... appreciated. Thank you. See Question&Answers more detail:os...

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

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434 views

1 answer

iphone - AirPlay button on custom view

4.3 finally :) I am searching right now how to add air play button to custom view. I have MPMoviePlayer that load ... send, what to listen...:( See Question&Answers more detail:os...

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

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472 views

1 answer

iphone - Getting a thumbnail of a *.mov video IOS

I want to get a thumbnail of videos (*.mov) which taken with iPhone/iPAD. I am trying to use AVFoundation ... to show a thumbnail of them. See Question&Answers more detail:os...

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

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389 views

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iphone - UIButton in UITableView cell like "Delete Event"

I'd like to add a button to a table cell. The "Delete Event" in the calendar app inspired me... (a ... is this at least the right approach? See Question&Answers more detail:os...

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

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391 views

1 answer

iphone - NSFetchedResultsController refresh refetch?

I want to refetch data from my NSFetchedResultsController using a different predicate which is set using ... return _fetchedResultsController; } See Question&Answers more detail:os...

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

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289 views

1 answer

iphone - Why are my ASIHTTPRequest files showing ARC errors?

I have implemented all of my ASIHTTPRequest files, but unfortunately the following errors occur: Why is this happening? See Question&Answers more detail:os...

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

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486 views

1 answer

iphone - Custom pin animation - MKMapView

I have used pin images in application instead of standard pin, now i want to give animation (dropping effect as it ... to custom pin images???? See Question&Answers more detail:os...

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

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357 views

1 answer

iphone - How to implement iTunes built-in App "File Sharing" feature

I've noticed that several apps, when an iP* is connected, has a "File Sharing" feature inside of iTunes. Example ... "File Sharing"'s Apps list. See Question&Answers more detail:os...

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

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247 views

1 answer

iphone - iOS UICollectionView - default flow, fill rows from right to left

I'm using in one of my apps UICollectionView, with custom cells but with default flow. Currently this view ... 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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438 views

1 answer

iphone - Does UIView's addSubview really retain the view?

I ran into a situation that seems to suggest otherwise. In the following code snippet, if I remove the line: self. ... .view]; [nav release]; } See Question&Answers more detail:os...

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

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349 views

1 answer

iphone - Accessing View in awakeFromNib?

I have been trying to set a UIImageView background color (see below) in awakeFromNib [imageView setBackgroundColor:[ ... not in this case. See Question&Answers more detail:os...

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

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480 views

1 answer

iphone - Transparent Background with a Modal UIViewController

I have a dilema, I want to present to the user a semi-transparent view. I found out by experimenting that if ... 'push over' the navigation bar? See Question&Answers more detail:os...

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

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