Recent questions tagged iPhone

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iphone - Passing custom data in [UIButton addTarget]

How do I add custom data while specifying a target in a UIButton? id data = getSomeData(); [button addTarget:self ... id) event data: (id) data See Question&Answers more detail:os...

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

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290 views

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iphone - Saving text file to documents directory in iOS 7

I am trying to save a plain text file to the Documents directory in iOS 7. Here is my code: //Saving ... if I use the NSTemporaryDirectory(). See Question&Answers more detail:os...

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

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321 views

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iphone - iOS - Position UIView in center of superview using Auto Layout programmatically

How do you programmatically set a UIView to be in the center of its superview using Auto Layout? UIButton* ... . Any suggestions? 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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283 views

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iphone - Code sign error with Xcode 3.2

I had a fully working build environment before upgrading to iPhone OS 3.1 and Xcode 3.2. Now when I try to ... , they would be welcome. :) See Question&Answers more detail:os...

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

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321 views

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iphone - How to mask UITableViewCells underneath a UITableView Transparent Header

I want the header to mask the cells, but not the background. I have a UITableView with transparent headers and ... View to a negative origin. See Question&Answers more detail:os...

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

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331 views

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iphone - How do I delete a file in my apps documents directory?

Given, a file of path [[self documentsDirectory] stringByAppendingPathComponent:@"myFiles/aFile.txt"], How do I ... my apps documents directory? See Question&Answers more detail:os...

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

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505 views

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iphone - How to compensate the flipped coordinate system of core graphics for easy drawing?

It's really a pain, but always when I draw an UIImage in -drawRect:, it's upside-down. When I flip the ... drawing not a pain in the butt? 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

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iphone - how to check if NSString = a specific string value?

Hi I am woundering if you can check to see if a NSString equals a specific value say for instance a name of a ... //do some stuff in here } See Question&Answers more detail:os...

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

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463 views

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iphone - Custom image mask in iOS

I have a issue with masking images. I do game "puzzle" and have to make custom images. I found and ... performance problem). 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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373 views

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iphone - iBeacon: get major and minor - only looking for uuid

I'm using the air locate example and monitoring for iBeacons by uuid only. When I get the entered region event, I ... been set... } Many 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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270 views

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iphone - iOS Application Background Downloading

Hey! I need to know how I can have my iOS Application start a download in the background of the ... )progressDidChangeTo:(int)progress function. 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

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iphone - Is there a way to use a custom selected image for UITabBarItem?

I like to have a custom selected image when a user selects an item on the tab bar, by default it ... . something like below any thoughts? See Question&Answers more detail:os...

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

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358 views

1 answer

iphone - Saving buffer data of AVPlayer

I am playing audio from my server using AVPlayer in my application. Now I want that when it completely buffer the ... save it for later use? See Question&Answers more detail:os...

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

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635 views

1 answer

iphone - @font-face not working in mobile Webkit

I'm having trouble getting @font-face to behave in any mobile Webkit browser I've tested--Safari on an iPhone 3GS, ... on in the CSS? 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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514 views

1 answer

iphone - Convert GMT NSDate to device's current Time Zone

I'm using Parse.com to store some values: These are GMT values. How do I convert these to the device's current ... and get NSDate as a result? See Question&Answers more detail:os...

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

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342 views

1 answer

iphone - How can I group MKAnnotations automatically regarding zoom level?

if the user zooms out on a MKMapView, i want MKAnnotations which are near to each other automatically grouped into ... " way to 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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303 views

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iphone - Apps are not permitted to access the UDID and must not use the uniqueIdentifier method of UIDevice

Will you please help me to fix this below mentioned issue getting from Apps store Apps are not permitted to ... deliver the corrected binary. See Question&Answers more detail:os...

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

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358 views

1 answer

iphone - javascript event Handler in uiwebview

I am displaying one UIWebView in my iPhone application. In UIWebView I am displaying HTML page which has JavaScript ... can I do this. 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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335 views

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iphone - How to get battery status?

How do I get the battery status on an iPhone? See Question&Answers more detail:os...

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

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308 views

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iphone - adding more than two button on the navigationbar

I am trying this but it does not work. -(void)viewDidLoad { // create a toolbar where we can place some buttons ... ; } How can I solve 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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337 views

1 answer

iphone - dismissModalViewController with transition: left to right

I was using a nice method to dismiss my modal view controller: [self dismissModalViewControllerWithTransition:2]; which ... ? 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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522 views

1 answer

iphone - Saving SecKeyRef device generated public/private key pair on disk

I've generated an RSA symmetric key pair on a device using SecKeyGeneratePair() on a device. I have ... OS X's SecKeychainItemExport(). See Question&Answers more detail:os...

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

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362 views

1 answer

iphone - How to set current playback duration and elapsed time on iOS 7 lockscreen?

Starting from iOS 5, every music player can set current playing music information such as title, artist, album ... way to solve this problem? See Question&Answers more detail:os...

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

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321 views

1 answer

iphone - Custom UITextField

How would I go about creating a UITextField like the one in this image? It appears to be slightly larger, specifically in height. See Question&Answers more detail:os...

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

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332 views

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iphone - What are the tradeoffs between performSelector:withObject:afterDelay: and dispatch_after

The only functional difference I have encountered is that I can cancel the message scheduled with performSelector: ... styles or conventions?) See Question&Answers more detail:os...

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

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584 views

1 answer

iphone - Converting NSData to int

I've an NSData object, the length is 4 bytes .These four bytes i'm extracting from another NSData object using ... bytes to an equivalent int. See Question&Answers more detail:os...

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

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339 views

1 answer

iphone - XCode - Multiple targets, Multiple *internationalized* names?

I've got an internationalized iPhone project. In the various ${lang}.lproj/InfoPlist.strings files I've got a ... it dynamically. 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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349 views

1 answer

iphone - How can I sort an NSMutableArray alphabetically?

I want to sort an NSMutableArray alphabetically. See Question&Answers more detail:os...

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

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