Recent questions tagged iPhone

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iphone - iOS: Device orientation on load

It seems that when my app loads, it does not know its current orientation: UIInterfaceOrientation orientation = [[ ... first load my app? 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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iphone - steps for creating UIScrollView with Interface Builder

I'm in the midst of trying to use a UIScrollView and there appears to be some fundamental thing that I'm ... of how this should work? See Question&Answers more detail:os...

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

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415 views

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iphone - Enabling crash logs symbolication in Xcode 4.2

I am using Xcode 4.2 and my crash logs are not getting symbolicated. How to enable this in Xcode 4.2? See Question&Answers more detail:os...

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

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iphone - What are pixels and points in iOS?

from UIImage reference: @property(nonatomic, readonly) CGSize size The dimensions of the image, taking orientation into ... and points in iOS? See Question&Answers more detail:os...

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

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492 views

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iphone - View frame changes between viewWillAppear: and viewDidAppear:

I have discovered a strange behavior in my application, where a connected IBOutlet has its connected view's frame ... What could be happening? See Question&Answers more detail:os...

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

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474 views

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iphone - iOS: Access app-info.plist variables in code

I am working on a Universal app & would like to access the values stored in app-info.plist file in my code. ... of all values in app-info.plist See Question&Answers more detail:os...

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

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439 views

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iphone - CGImage/UIImage lazily loading on UI thread causes stutter

My program displays a horizontal scrolling surface tiled with UIImageViews from left to right. Code runs on ... 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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iphone - Keychain group access to share data between my existing applications

I have many iOS applications live on AppStore. Now for next version of apps, I want to keep a piece of ... Appreciate any help in this regard. See Question&Answers more detail:os...

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

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iphone - How to write exif metadata to an image (not the camera roll, just a UIImage or JPEG)

I am aware of how to save metadata using ALAssets. But, I want to save an image, or upload it ... probably an NSData JPEG representation)? See Question&Answers more detail:os...

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

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iphone - What is -[NSString sizeWithFont:forWidth:lineBreakMode:] good for?

In my question "How do I get -[NSString sizeWithFont:forWidth:lineBreakMode:] to work?", I learned that -[ ... it? (Examples would help.) See Question&Answers more detail:os...

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

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359 views

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iphone - iOS: Using device modifiers for loading xib files?

You can use a device modifier (i.e., ~ipad) to provide a device-specific key in Info.plist, and to specify a ... listed above) are 4.0 minimum. See Question&Answers more detail:os...

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

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iphone - Light gray background in "bounce area" of a UITableView

Apple's iPhone apps such as Music and Contants use a search bar in a UITableView. When you scroll down so that the ... is there a built in 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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534 views

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iphone - How to calculate time in hours between two dates in iOS

How can I calculate the time elapsed in hours between two times (possibly occurring on different days) in iOS? See Question&Answers more detail:os...

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

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589 views

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iphone - How to recognize swipe gesture in UIScrollView

I'm trying to recognize left/right swipe gesture in a UIScrollView. I've tried to create ... in touchesBegan/Ended 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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340 views

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iphone - Using Objective C to read log messages posted to the device console

How can my iOS application read messages from the devices console log. I want to programmatically read through these ... much for any help! See Question&Answers more detail:os...

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

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291 views

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iphone - Last In-First Out Stack with GCD?

I have a UITableView that displays images associated with contacts in each row. In some cases these images are read ... up implementing... :) See Question&Answers more detail:os...

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

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542 views

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iphone - How to merge conflicts (file project.pbxproj) in Xcode use svn?

There are two members in our team. We use Xcode's SCM (use SVN) to manger our source code files. We all add ... , how to solve it? Thank you! See Question&Answers more detail:os...

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

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469 views

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iphone - How can I set the background of UITableView (the tableview style is "Grouped") to use an image?

How can I set the background of UITableView (the tableview style is "Grouped") to use an image? See Question&Answers more detail:os...

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

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427 views

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iphone - Add UIView Above All Other Views, Including StatusBar

I'm wanting to create a view (UIControl) which blocks all input and shows a UIActivityIndicatorView while ... progress, is processing. See Question&Answers more detail:os...

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

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290 views

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iphone - The entitlements specified...profile. (0xE8008016). Error iOS 4.2

I am getting the 'dreaded' error The entitlements specified in your application's Code Signing Entitlements file do ... me with this problem? See Question&Answers more detail:os...

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

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397 views

1 answer

iphone - Preventing a UITabBar from applying a gradient to its icon images

When I make icons for a UITabBar, it applies a gradient to the images. I need to know how to prevent it from having this gradient. 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

1 answer

iphone - iOS 5 does not allow to store downloaded data in Documents directory?

I have made an application for my client by keeping target iOS as 4. But since the application still not ... the accepted answer is correct. See Question&Answers more detail:os...

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

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328 views

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iphone - Pixel Width of the text in a UILabel

I need to draw a UILabel striked through. Therefore I subclassed UILabel and implemented it as follows: @implementation ... known :) Best, Erik See Question&Answers more detail:os...

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

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327 views

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iphone - Access the camera with iOS

It seems obvious that some people have been able to figure out how to access the iPhone camera through the SDK ( ... . How can this be done? See Question&Answers more detail:os...

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

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584 views

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iphone - Access App Identifier Prefix programmatically

How can I access the Bundle Seed ID/Team ID/App Identifier Prefix string programmatically? (These are all the ... hard-coding it if 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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297 views

1 answer

iphone - Getting the bounds of an MKMapView

In order to setup a query to an external server I want to get the bounds of the current Map View in an ... based on the parent view coordinates. See Question&Answers more detail:os...

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

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432 views

1 answer

iphone - What is objc_setAssociatedObject() and in what cases should it be used?

In a project I have taken on, the original author has opted to use objc_setAssociatedObject() and I'm not ... 's already an instance variable? See Question&Answers more detail:os...

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

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639 views

1 answer

iphone - Moving UITabBarItem Image down?

Normally on each tab of a UITabBar you have a small image and a title naming the tab. The image is positioned ... of unused space at the bottom. See Question&Answers more detail:os...

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

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