Recent questions tagged iPhone

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iphone - How can I retrieve a return value from a completion block?

Is it possible to run a completion block on the main thread? For example, I have one method which returns a value ... thread. How can I do 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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464 views

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iphone - Push Notifications in Mavericks iOS Simulator

I can't find anything about this, and I have never done anything with push notifications (but I know vaguely how ... could test on my computer. See Question&Answers more detail:os...

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

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382 views

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iphone - How to cancel UIView block-based animation?

I've searched loads of SO stuff and in Apple's references, but still unable to manage my problem. What ... for letters in animation chain See Question&Answers more detail:os...

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

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556 views

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iphone - Get RGB value from UIColor presets

I my application I pass RGB color value to server. My app uses UIColor predefined values, like [UIColor grayColor] ... non-RBG colors? 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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386 views

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iphone - Generate hash from UIImage

I'm trying to compare two UIImages from the file system to see if they are the same. Obviously, I can't ... for comparing to images totally off? See Question&Answers more detail:os...

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

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452 views

1 answer

iphone - iOS 6 Facebook posting procedure ends up with "remote_app_id does not match stored id"

This is my third question about posting on Facebook. Although this may be a duplicate of Mac OS X Facebook login ... remote and stored app ids? See Question&Answers more detail:os...

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

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285 views

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iphone - MFMailComposeViewController image orientation

I'm developing a Universal app and I'm coding for iOS6. I'm using the imagePickerController to take a photo and ... its current state." ); } See Question&Answers more detail:os...

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

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316 views

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iphone - Get location name from Latitude & Longitude in iOS

I want to find current location name from latitude and longitude, Here is my code snippet I tried but my log shows null ... .country; } } }]; } See Question&Answers more detail:os...

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

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351 views

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iphone - Is programmatically inverting the colors of an image possible?

I want to take an image and invert the colors 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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467 views

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iphone - How to adjust font size of label to fit the rectangle?

Yeah, there's this cool myLabel.adjustsFontSizeToFitWidth = YES; property. But as soon as the label has two lines or ... another way to do it? See Question&Answers more detail:os...

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

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354 views

1 answer

iphone - Simultaneous AVCaptureVideoDataOutput and AVCaptureMovieFileOutput

I need to be able to have AVCaptureVideoDataOutput and AVCaptureMovieFileOutput working at the same time. The below ... (NSError *)error Cheers See Question&Answers more detail:os...

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

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613 views

1 answer

iphone - How to stop multiple times method calling of didUpdateLocations() in ios

This my code...... -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations { ... t want..... See Question&Answers more detail:os...

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

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441 views

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iphone - Is ARC really supported in iOS 4? The iOS 4.2 SDK is missing ARC-related symbols at linking time

I've read and heard since ARC was first announced that it was a compile-time thing and would be backwards-compatible ... Xcode 4.2 (Build 4C199) See Question&Answers more detail:os...

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

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322 views

1 answer

iphone - UITableView dequeueReusableCellWithIdentifier Theory

When apple developed the UITableView for the first iPhone they had a problem in performance when scrolling through it ... itself from the queue. See Question&Answers more detail:os...

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

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370 views

1 answer

iphone - Programmatically detect if app is being run on device or simulator

I'd like to know whether my app is being run on device or simulator at run time. Is there a way to detect ... -os-31-gamekit-pt-1-woooohooo.html See Question&Answers more detail:os...

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

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568 views

1 answer

iphone - How to make a modulo operation in objective-c / cocoa touch?

I have two CGFloat values, and want to calculate the modulo result. Or in other words: I want to know what's ... to binary %". Any idea? See Question&Answers more detail:os...

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

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597 views

1 answer

iphone - iOS - Scale and crop CMSampleBufferRef/CVImageBufferRef

I am using AVFoundation and getting the sample buffer from AVCaptureVideoDataOutput, I can write it directly to ... slows down the performance. See Question&Answers more detail:os...

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

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486 views

1 answer

iphone - UIView with a Dashed line

What I have: To create this line, I basically have an UIView and I do the following: void setLayerToLineFromAToB( ... you want a dashed one. See Question&Answers more detail:os...

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

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483 views

1 answer

iphone - Round corners on UITableView

What is the best way to get round corners on an entire UITableView as seen in Stocks and Spotlight? The ... show through through the corners. See Question&Answers more detail:os...

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

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323 views

1 answer

iphone - How to find UILabel's number of Lines

I displayed the text in UILabel by using wrap method. Now I want to need to find the how many number of ... s number of lines count. 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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409 views

1 answer

iphone - NSDateFormatter returning nil in OS 4.0

I had the following code working on on OS 3.x NSString *stringDate = @"2010-06-21T20:06:36+00:00"; ... methods. What did i leave out? See Question&Answers more detail:os...

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

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455 views

1 answer

iphone - Can i pop to Specific ViewController?

I am using navigation based application. I push First ViewController to Second ViewController and from Second ViewController ... x animated:NO]; See Question&Answers more detail:os...

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

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303 views

1 answer

iphone - Keeping object on top of keyboard in the event of becomeFirstResponder or resignFirstResponder?

I currently have a UITextField on top of a keyboard. When you tap it, it should stick on top of the keyboard ... to the top of the keyboard. 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

1 answer

iphone - pdf file text reading and searching

I want to read text from pdf file and search text into pdf file. here the link that i know. none ... iPhone application Thanks, shyam parmar 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 - Does AFNetworking have backgrounding support?

I'm in the process of investigating AFNetworking as a replacement for ASIHTTPRequest, and notice a complete lack ... for this in AFNetworking? See Question&Answers more detail:os...

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

0 votes

591 views

1 answer

iphone - UITextField with secure entry, always getting cleared before editing

I am having a weird issue in which my UITextField which holds a secure entry is always getting cleared when I ... way to prevent this behaviour? See Question&Answers more detail:os...

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

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391 views

1 answer

iphone - Can I edit the pixels of the UIImage's property CGImage

UIImage has a read-only property CGImage. I have to read its pixels to a memory block and edit them and ... postProcess are called just once. 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 - How do I use CaptiveNetwork to get the current WiFi Hotspot Name

I need to get the name of the currently connected Wi-Fi hotspot, e.g. "BT OpenZone" I have been told it ... any help would be much 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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