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iphone - draw outer half circle with gradient using core graphics in iOS?
    i want to draw a shape like in the attached image using core graphics in iOS. Is this possible. Please ... color gradient over the shape. 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 - iOS 8 Photos framework. Access photo metadata
    I'm looking at replacing ALAssetsLibrary with Photos framework in my app. I can retrieve photos, collections, and ... up in a PHAsset category. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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259 views
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iphone - When to use addChildViewController vs pushViewController
    I just watched a 2011 WWDC presentation on "Implementing UIViewController Containment" (here's a link to the video) ... thoughts on the matter! See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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292 views
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iphone - How do you update the app icons and launch images to support IOS 6 and 7 simultaneously?
    I have been stymied figuring out how to release an application from Xcode5 that supports IOS7 AND IOS 6+ ... multiple OS versions? Andrew See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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665 views
1 answer
iphone - UIScrollView custom paging size
    paging in UIScrollView is a great feature, what I need here is to set the paging to a smaller distance, ... the UIScrollView frame width. 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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230 views
1 answer
iphone - UITableView flexible/dynamic heightForRowAtIndexPath
    Case Normally you would use the cellForRowAtIndexPath delegate method to setup your cell. The information set for ... as flexible as possible. 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 - Bundle Name, Executable Name, Product Name...anything else?
    Bundle Name, Executable Name, Product Name... any more?? can someone please help clarify the use of each of ... right cubby hole in my head? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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403 views
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iphone - Xcode doesn't see my iOS device but iTunes does
    I have a strange problem. I have an iPad with iOS 5.0.1 (9A405) and iOS SDK 5.0.1 with Xcode 4. ... certificate, etc. Does anybody have 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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279 views
1 answer
iphone - Implement custom animation to present modal view from specified view on iPad
    On the iPad we get much more room to work with, so presenting full screen modal views is not ideal. I know ... it, hopefully you guys can 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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380 views
1 answer
iphone - Horizontal UIScrollView and hundreds of thumbnail images in iOS?
    I need to create a horizontal UIScrollView which to hold hundreds of thumbnail images, just like a slide of ... of the screen. 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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250 views
1 answer
iphone - How do I verify reference count in ARC mode?
    I used to verify that some of my variables had the expected retain count using [myVar retainCount] under the ... is there an alterante solution? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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356 views
1 answer
iphone - How to detect "IAP crackers"?
    I found out that many users use so-called "IAP crackers" instead of purchasing the items in in-app purchase ( ... there anybody who knows how? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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288 views
1 answer
iphone - How to safely shut down a loading UIWebView in viewWillDisappear?
    I have a view containing a UIWebView which is loading a google map (so lots of javascript etc). The ... 't happen immediately after that. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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252 views
1 answer
iphone - Handling app delegates and switching between views
    I'm getting a warning about a semantic issue pertaining to passing a *const _strong to type id and ... 'id<ProductsViewControllerDelegate>' [3] See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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247 views
1 answer
iphone - Core Data VS Sqlite or FMDB....?
    Now this might look like a duplicate thread, but my question is that I have read a lot of questions like.. Core ... will come to me with time.? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
247 views
1 answer
iphone - iOS - add contact into Contacts?
    Heyo! Is there a way how when a user taps a button it can add or update a contact into the actual Apple ... and find in their contact book. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
561 views
1 answer
iphone - UIView: opaque vs. alpha vs. opacity
    How do opaque alpha and the opacity of the background work together for a UIView and what are the differences ... i.minus.com/jb2IP8TXbYTxKr.png See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
320 views
1 answer
iphone - Xcode 4 + iOS 4.3: "No Packager exists for the type of archive"
    I just upgraded to Xcode 4 and am trying to create an adhoc build of an earlier project. Whenever I use the " ... been migrated from Xcode 3.2? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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214 views
1 answer
iphone - Objective-C: Asynchronously populate UITableView - how to do this?
    I can't seem to find any info on this question, so I thought I'd ask the community. Basically, I have a ... reloadData]; and now it works... See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
244 views
1 answer
iphone - How to set accuracy and distance filter when using MKMapView
    When i use setShowsUserLocation with MKMapView to track user location, how do I set the accuracy and ... about CLLocationManager. Thanks, See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
280 views
1 answer
iphone - Creating a Pop animation similar to the presentation of UIAlertView
    I would like to present a view in the same manner as that of UIAlertView - a pop/spring. Unfortunately ... ); [UIView commitAnimations]; } See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
440 views
1 answer
iphone - What happens to SDWebImage Cached Images in my app when the image file on the server changes?
    I am using the SDWebImage library to cache web images in my app: https://github.com/rs/SDWebImage/blob/ ... appreciated. Thanks in advance. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
275 views
1 answer
iphone - Xcode 4.5 Storyboard 'Exit'
    I have just installed Xcode 4.5 for iOS6 support, and I have seen a new icon called 'Exit' in my Storyboard, ... how it works, what its for? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
410 views
1 answer
iphone - iOS Development: How can I induce low memory warnings on device?
    I'd like to test my app functions well in low memory conditions, but it's difficult to test. How can I induce ... don't work on the simulator. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
190 views
1 answer
iphone - Is there a public API for card view UI that can be seen across iOS 10?
    The Music app in iOS 10 adopts a new card-like appearance: Now Playing screen slides up, while the view ... achieving this card-like appearance? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
338 views
1 answer
iphone - Indent the text in a UITextField
    My question is as simple as the title, but here's a little more: I have a UITextField, on which I've ... image and where the text starts. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
503 views
1 answer
iphone - How to determine at run-time if app is for development, app store or ad hoc distribution?
    Is there a way to determine programmatically if the currently running app was built and signed for development only or ... is in ASN.1 format. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
495 views
1 answer
iphone - How do I replace weak references when using ARC and targeting iOS 4.0?
    I've begun developing my first iOS app with Xcode 4.2, and was targeting iOS 5.0 with a "utility application" ... with iOS 4 AND 5 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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