Recent questions tagged iPhone

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iphone - UIApplication sharedApplication - keyWindow is nil?

I want to convert a CGPoint from my UIView to UIWindow coordinates and have realized that UIApplication keyWindow is ... nil. Why is this? See Question&Answers more detail:os...

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

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287 views

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iphone - I want to use animation to imageview using UIanimationtransitioncurl right or left. Is it possible?

I want to animate my photo gallery like the pages of the book. Is there any method with that I can use ... ]; } [UIView commitAnimations]; } See Question&Answers more detail:os...

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

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299 views

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iphone - Received memory warning on setimage

This problem has completely stumped me. This is for iOS 5.0 with Xcode 4.2 What's going on is that in my app I ... :707] It went to END! (gbc) See Question&Answers more detail:os...

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

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286 views

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iphone - iOS SDK : playing music on the background and switching views

I am trying to play music in my application. The music works fine but after switching viewControllers and returning to ... [myMusic play]; } } 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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iphone - UIImage with transparent rounded corners

I'm using following code to add rounded corners to my UIImage, but the problem is that the rounded ... . CGContextRestoreGState(context); } See Question&Answers more detail:os...

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

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484 views

1 answer

iphone - How can I cancel an asynchronous call through NSURLConnection sendAsynchronousRequest?

I've got a web service call performing some validation on user input in real time. I'd like to use [ ... way to cancel a current request? See Question&Answers more detail:os...

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

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294 views

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iphone - subclassed UITableViewCell - backgroundView covers up anything I do in drawRect

I'm trying to make a subclassed UITableViewCell where I draw an image in the upper right corner. I ... cell.backgroundView = bgImageView; See Question&Answers more detail:os...

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

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545 views

1 answer

iphone - Bad URL when requesting with NSURL

I'm trying to request this kind of URL in iPhone 4.0 SDK (access token slightly modified because you don't ... ]+ Done limit=40 Any ideas? See Question&Answers more detail:os...

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

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416 views

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iphone - How can I perform facial recogntion on iOS?

I've started work on an application for iOS that would recognize faces from a photo or from the iPhone / iPad ... just detection, exist for 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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273 views

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iphone - iOS: How do I generate 8 unique random integers?

I need to generate 8 random integers, but they need to be unique, aka not repeated. For example, I want 8 ... ]; } } return uniqueNumbers; } 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

1 answer

iphone - UITextField text disappears on every other keystroke

Here is a video of the phenomena: http://youtu.be/c0TP8YVF9TE As the video shows, the value in ... /gist.github.com/andrewschreiber/6970283 See Question&Answers more detail:os...

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

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395 views

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iphone - NSPredicate endswith multiple files

I am trying to filter an array using a predicate checking for files ending in a set of extensions. How could I do it? ... , @".xls", nil] ]]; See Question&Answers more detail:os...

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

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450 views

1 answer

iphone - Is there any length limit of string stored in Keychain?

I want to store some userinfo as a string in Keychain on iOS, so is there any length limit of the string in Keychain? Thanks. See Question&Answers more detail:os...

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

0 votes

258 views

1 answer

iphone - Using a singleton to create an array accessible by multiple views

It's a classic problem. I would like to access an array of objects from anywhere within my app. I ... .bananas addObject:rottenBanana]; } See Question&Answers more detail:os...

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

0 votes

584 views

1 answer

iphone - Convert hex data string to NSData in Objective C (cocoa)

fairly new iPhone developer here. Building an app to send RS232 commands to a device expecting them over a TCP/ ... to NSData. Any ideas? See Question&Answers more detail:os...

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

0 votes

447 views

1 answer

iphone - How to get click event from a button added over MKAnnotationView

Anyone know if there's a way to get click event from a button that is added to MKAnnotationView, ... [pinButton setUserInteractionEnabled:YES]; 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 - How to use pList in iOS Programming

Recently, I'm a senior in high school, and I'm interested in making apps for iPhone. Recently, one of my apps ... to use a plist. Any tips? See Question&Answers more detail:os...

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

0 votes

445 views

1 answer

iphone - Find available wi-fi networks

How can I find and list all the wi-fi networks in range? See Question&Answers more detail:os...

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

0 votes

366 views

1 answer

iphone - iOS - Linker error after upgrading to Xcode 4.5, possibly Core Plot related

I've just upgraded to Xcode 4.5GM and tidied up some screens in my iPhone project to cope with the extra screen size ... and iOS 6). Any ideas? See Question&Answers more detail:os...

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

0 votes

357 views

1 answer

iphone - AVAudioPlayer with external URL to *.m4p

My Problem is the following. I got this code and i guess a corrupt NSURL since the AVAudioPlayer is nil after ... . (OSStatus error -43.)" See Question&Answers more detail:os...

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

0 votes

487 views

1 answer

iphone - Replace icon pin by text label in annotation?

Is it possible to replace the pin icon of an annotation by a dynamic text label? Maybe using css, or ... Google Maps API with JavaScript. See Question&Answers more detail:os...

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

0 votes

441 views

1 answer

iphone - NSDateFormatter and Time Zone issue?

I have a string with time in GMT and i want to make it according to the system time zone but its ... updated according system time zone. 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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389 views

1 answer

iphone - MKMapView setRegion "snaps" to predefined zoom levels?

Can anyone confirm that setRegion "snaps" to predefined zoom levels and whether or not this behavior is as designed ... double-taps the map. See Question&Answers more detail:os...

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

0 votes

393 views

1 answer

iphone - iOS deployment target

IF I set the deployment target for my app to iOS 4.2 when submitting to app store, will users with iOS 3 ... and install the app itself? Thanks. See Question&Answers more detail:os...

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

0 votes

365 views

1 answer

iphone - Calling a method from another class in Objective C

I have 2 classes, say class A and class B. Class B is created in class A. I have a method in class ... it possible to do this using protocols. See Question&Answers more detail:os...

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

0 votes

438 views

1 answer

iphone - iOS print without allowing UIPrintInteractionController to appear

I am researching a potential app for a client, and I had a question I wasn't able to find the answer on. ... . Anyone know how this is done? See Question&Answers more detail:os...

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

0 votes

274 views

1 answer

iphone - wait_fences: failed to receive reply: 10004003 error - UIAlert WITHOUT UITextField present

I am working on an app where a UIAlert pops up the first time the user begins using ... , MKReverseGeocoderDelegate, UIAlertViewDelegate> See Question&Answers more detail:os...

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

0 votes

350 views

1 answer

iphone - Force UIImagePickerController to take photo in portrait orientation/dimensions iOS

The only allowed orientation in my app is landscape. I force this in the project ... = UIImagePickerControllerCameraFlashModeOff; See Question&Answers more detail:os...

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

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