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2014/10/15 ¤U¤È 10:08:37
iphone Programming Glossary: expectRetrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage bytesPerPixel unsigned char alpha rawData byteIndex 3 However I don't get the values I expect. For a completely black transparent area of the image I get non zero values for the alpha channel. Do.. and Core Graphics coordinates. However after setting the blend mode my alpha values were what I expected CGContextSetBlendMode context kCGBlendModeCopy iphone uikit core graphics quartz graphics share..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone Uploader Private connection didReceiveData Called when we have data from the server. We expect the server to reply with a YES if the upload succeeded or NO if it did not. Results None Side effects..
Assertion failure in dequeueReusableCellWithIdentifier:forIndexPath: http://stackoverflow.com/questions/12737860/assertion-failure-in-dequeuereusablecellwithidentifierforindexpath didn't register a nib or a class for the reuse identifier Cell . Looking at your code you seem to expect the dequeue method to return nil if it doesn't have a cell to give you. You need to use the dequeueReusableCellWithIdentifier..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing what that means. If I create a RootViewController and call addSubView on that controller I would expect the added view s to be wired up for viewWillAppear events. Does anyone have an example of a complex..
iPhone sending POST with NSURLConnection http://stackoverflow.com/questions/2071788/iphone-sending-post-with-nsurlconnection Any ideas iphone post nsurlconnection share improve this question Your data is wrong. If you expect the data to be found in the _POST array of PHP it should look like this const char bytes mydata Hello.. HTTP Content Type the default type application x www form urlencoded will be used. And this type expects the POST data to have the same format as it would have in a GET request. However if you set a different..
iPad Web App: Detect Virtual Keyboard Using JavaScript in Safari? http://stackoverflow.com/questions/2593139/ipad-web-app-detect-virtual-keyboard-using-javascript-in-safari 0 window .scrollTop 0 '#test' .append keyboard_shown 'keyboard ' 'nokeyboard ' Normally you would expect this to not be visible to the user. Unfortunately at least when running in the Simulator the iPad visibly..
Popover with embedded navigation controller doesn't respect size on back nav http://stackoverflow.com/questions/2752394/popover-with-embedded-navigation-controller-doesnt-respect-size-on-back-nav setContentSizeForViewInPopover CGSizeMake 320 500 size different for each controller This works as expected as I navigate forward in the hierarchy the popover automatically animates size changes to correspond.. doesn't change size it remains as large as the deepest view reached. This seems broken to me I'd expect the popover to respect the sizes that are set up as it pops through the view stack. Am I missing something..
How to do a natural sort on an NSArray? http://stackoverflow.com/questions/2846301/how-to-do-a-natural-sort-on-an-nsarray so they look like this file1 file2 file3 ... file10 file11 file12 I'm getting as you would expect file1 file10 file11 file12 file2 file3 ... Does anyone know if there is a way built in to the NSArray..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c property will access the ivar with the same name as the property indicates that's the pattern they expect you to follow. No matter what since objects still have to send messages to themselves to access properties..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints very easily with a UIWebView but this cant give the performance and functionality that you would expect from a good PDF viewer. You can draw a PDF page to a CALayer or to a UIImage . Apple even have sample..
iOS UIImagePickerController result image orientation after upload http://stackoverflow.com/questions/5427656/ios-uiimagepickercontroller-result-image-orientation-after-upload while holding it landscape the image gets uploaded to the server and it viewed like you would expect. when taking a picture holding the phone in portrait the image is uploaded and viewed as it had been..
Property vs instance variable in Objective-C [duplicate] http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c property will access the ivar with the same name as the property indicates that's the pattern they expect you to follow. No matter what since objects still have to send messages to themselves to access properties..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage the UIImageView. int byteIndex bytesPerRow uiViewPoint.y uiViewPoint.x bytesPerPixel unsigned char alpha rawData byteIndex 3 However I don't get the values I expect. For a completely black transparent area of the image I get non zero values for the alpha channel. Do I need to translate the co ordinates between UIKit and Core.. I did not in fact need to translate between UIKit coordinates and Core Graphics coordinates. However after setting the blend mode my alpha values were what I expected CGContextSetBlendMode context kCGBlendModeCopy iphone uikit core graphics quartz graphics share improve this question Yes CGContexts have their y axis pointing..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone NSURLResponse response IN NSLog @ s self 0x p n __func__ self Uploader Private connection didReceiveData Called when we have data from the server. We expect the server to reply with a YES if the upload succeeded or NO if it did not. Results None Side effects None void connection NSURLConnection connection IN didReceiveData..
Assertion failure in dequeueReusableCellWithIdentifier:forIndexPath: http://stackoverflow.com/questions/12737860/assertion-failure-in-dequeuereusablecellwithidentifierforindexpath method before calling this method. You didn't register a nib or a class for the reuse identifier Cell . Looking at your code you seem to expect the dequeue method to return nil if it doesn't have a cell to give you. You need to use the dequeueReusableCellWithIdentifier for that behavior UITableViewCell..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing view hierarchy just right. My problem is I can't figure out what that means. If I create a RootViewController and call addSubView on that controller I would expect the added view s to be wired up for viewWillAppear events. Does anyone have an example of a complex programmatic view heirarchy that successfully recieves viewWillAppear..
iPhone sending POST with NSURLConnection http://stackoverflow.com/questions/2071788/iphone-sending-post-with-nsurlconnection some lame mistake somewhere but I can't seem to find it Any ideas iphone post nsurlconnection share improve this question Your data is wrong. If you expect the data to be found in the _POST array of PHP it should look like this const char bytes mydata Hello 20World If you want to send XML Data you need to set a different.. you might set application xml charset utf 8 If you set no HTTP Content Type the default type application x www form urlencoded will be used. And this type expects the POST data to have the same format as it would have in a GET request. However if you set a different HTTP Content Type like application xml then this data is..
iPad Web App: Detect Virtual Keyboard Using JavaScript in Safari? http://stackoverflow.com/questions/2593139/ipad-web-app-detect-virtual-keyboard-using-javascript-in-safari window .scrollTop 10 var keyboard_shown window .scrollTop 0 window .scrollTop 0 '#test' .append keyboard_shown 'keyboard ' 'nokeyboard ' Normally you would expect this to not be visible to the user. Unfortunately at least when running in the Simulator the iPad visibly though quickly scrolls up and down again. Still it works..
Popover with embedded navigation controller doesn't respect size on back nav http://stackoverflow.com/questions/2752394/popover-with-embedded-navigation-controller-doesnt-respect-size-on-back-nav I set the view's popover context size like so self setContentSizeForViewInPopover CGSizeMake 320 500 size different for each controller This works as expected as I navigate forward in the hierarchy the popover automatically animates size changes to correspond to the pushed controller. However when I navigate Back through.. view stack via the navigation bar's Back button the popover doesn't change size it remains as large as the deepest view reached. This seems broken to me I'd expect the popover to respect the sizes that are set up as it pops through the view stack. Am I missing something Thanks. iphone ipad uiviewcontroller uinavigationcontroller..
How to do a natural sort on an NSArray? http://stackoverflow.com/questions/2846301/how-to-do-a-natural-sort-on-an-nsarray an ASCII sort instead of a natural sort. The titles are filenames so they look like this file1 file2 file3 ... file10 file11 file12 I'm getting as you would expect file1 file10 file11 file12 file2 file3 ... Does anyone know if there is a way built in to the NSArray sorting functionality to get this natural sorting as opposed..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c but the fact that by default synthesized accessors for a property will access the ivar with the same name as the property indicates that's the pattern they expect you to follow. No matter what since objects still have to send messages to themselves to access properties it's hard to confuse when you're accessing a property..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints recently about drawing PDF's. Yes you can render PDF's very easily with a UIWebView but this cant give the performance and functionality that you would expect from a good PDF viewer. You can draw a PDF page to a CALayer or to a UIImage . Apple even have sample code to show how draw a large PDF in a Zoomable UIScrollview..
iOS UIImagePickerController result image orientation after upload http://stackoverflow.com/questions/5427656/ios-uiimagepickercontroller-result-image-orientation-after-upload the problem when i take a picture with the iphone while holding it landscape the image gets uploaded to the server and it viewed like you would expect. when taking a picture holding the phone in portrait the image is uploaded and viewed as it had been rotated 90 degrees. my application is set to only work in portrait..
Property vs instance variable in Objective-C [duplicate] http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c but the fact that by default synthesized accessors for a property will access the ivar with the same name as the property indicates that's the pattern they expect you to follow. No matter what since objects still have to send messages to themselves to access properties it's hard to confuse when you're accessing a property..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage uiViewPoint.y uiViewPoint.x bytesPerPixel unsigned char alpha rawData byteIndex 3 However I don't get the values I expect. For a completely black transparent area of the image I get non zero values for the alpha channel. Do I need to translate.. UIKit coordinates and Core Graphics coordinates. However after setting the blend mode my alpha values were what I expected CGContextSetBlendMode context kCGBlendModeCopy iphone uikit core graphics quartz graphics share improve this question..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone 0x p n __func__ self Uploader Private connection didReceiveData Called when we have data from the server. We expect the server to reply with a YES if the upload succeeded or NO if it did not. Results None Side effects None void connection..
Assertion failure in dequeueReusableCellWithIdentifier:forIndexPath: http://stackoverflow.com/questions/12737860/assertion-failure-in-dequeuereusablecellwithidentifierforindexpath this method. You didn't register a nib or a class for the reuse identifier Cell . Looking at your code you seem to expect the dequeue method to return nil if it doesn't have a cell to give you. You need to use the dequeueReusableCellWithIdentifier..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing is I can't figure out what that means. If I create a RootViewController and call addSubView on that controller I would expect the added view s to be wired up for viewWillAppear events. Does anyone have an example of a complex programmatic view heirarchy..
iPhone sending POST with NSURLConnection http://stackoverflow.com/questions/2071788/iphone-sending-post-with-nsurlconnection seem to find it Any ideas iphone post nsurlconnection share improve this question Your data is wrong. If you expect the data to be found in the _POST array of PHP it should look like this const char bytes mydata Hello 20World If you want.. utf 8 If you set no HTTP Content Type the default type application x www form urlencoded will be used. And this type expects the POST data to have the same format as it would have in a GET request. However if you set a different HTTP Content Type..
http://stackoverflow.com/questions/2080644/is-it-possible-in-principle-for-an-android-device-to-interface-with-an-iphone say within 12 24 months. As a developer familiar with but not specializing in two major smartphone platforms should I expect an Android library to come out which can spoof itself onto an iPhone app's GameKit based network. It seems reasonable that..
iOS: Download image from url and save in device http://stackoverflow.com/questions/2499176/ios-download-image-from-url-and-save-in-device thedata iphone ios image cocoa touch ipad share improve this question If you set theData to nil what do you expect it to write to the disk What you can use is NSData theData NSData dataWithContentsOfURL yourURLHere to load the data from..
iPad Web App: Detect Virtual Keyboard Using JavaScript in Safari? http://stackoverflow.com/questions/2593139/ipad-web-app-detect-virtual-keyboard-using-javascript-in-safari window .scrollTop 0 window .scrollTop 0 '#test' .append keyboard_shown 'keyboard ' 'nokeyboard ' Normally you would expect this to not be visible to the user. Unfortunately at least when running in the Simulator the iPad visibly though quickly..
Popover with embedded navigation controller doesn't respect size on back nav http://stackoverflow.com/questions/2752394/popover-with-embedded-navigation-controller-doesnt-respect-size-on-back-nav size like so self setContentSizeForViewInPopover CGSizeMake 320 500 size different for each controller This works as expected as I navigate forward in the hierarchy the popover automatically animates size changes to correspond to the pushed controller... button the popover doesn't change size it remains as large as the deepest view reached. This seems broken to me I'd expect the popover to respect the sizes that are set up as it pops through the view stack. Am I missing something Thanks. iphone..
How to do a natural sort on an NSArray? http://stackoverflow.com/questions/2846301/how-to-do-a-natural-sort-on-an-nsarray The titles are filenames so they look like this file1 file2 file3 ... file10 file11 file12 I'm getting as you would expect file1 file10 file11 file12 file2 file3 ... Does anyone know if there is a way built in to the NSArray sorting functionality..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c accessors for a property will access the ivar with the same name as the property indicates that's the pattern they expect you to follow. No matter what since objects still have to send messages to themselves to access properties it's hard to..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints you can render PDF's very easily with a UIWebView but this cant give the performance and functionality that you would expect from a good PDF viewer. You can draw a PDF page to a CALayer or to a UIImage . Apple even have sample code to show how draw..
Can use AVCaptureVideoDataOutput and AVCaptureMovieFileOutput at the same time? http://stackoverflow.com/questions/4944083/can-use-avcapturevideodataoutput-and-avcapturemoviefileoutput-at-the-same-time outputSettings outputSettings I'm going to push pixel buffers to it so will need a AVAssetWriterPixelBufferAdaptor to expect the same 32BGRA input as I've asked the AVCaptureVideDataOutput to supply AVAssetWriterInputPixelBufferAdaptor pixelBufferAdaptor.. check error conditions this example is too lazy assetWriter addInput assetWriterInput we need to warn the input to expect real time data incoming so that it tries to avoid being unavailable at inopportune moments assetWriterInput.expectsMediaDataInRealTime.. to expect real time data incoming so that it tries to avoid being unavailable at inopportune moments assetWriterInput.expectsMediaDataInRealTime YES ... eventually ... assetWriter startWriting assetWriter startSessionAtSourceTime kCMTimeZero captureSession..
http://stackoverflow.com/questions/5360846/suspend-the-application and predictable. And when actions are simple and straightforward users can easily understand and remember them. People expect to have ample opportunity to cancel an operation before it begins and they expect to get a chance to confirm their intention.. understand and remember them. People expect to have ample opportunity to cancel an operation before it begins and they expect to get a chance to confirm their intention to perform a potentially destructive action. Finally people expect to be able.. and they expect to get a chance to confirm their intention to perform a potentially destructive action. Finally people expect to be able to gracefully stop an operation that ™s underway. There should be no reason that you need to force your application..
iOS UIImagePickerController result image orientation after upload http://stackoverflow.com/questions/5427656/ios-uiimagepickercontroller-result-image-orientation-after-upload picture with the iphone while holding it landscape the image gets uploaded to the server and it viewed like you would expect. when taking a picture holding the phone in portrait the image is uploaded and viewed as it had been rotated 90 degrees...
NSString retainCount is 2147483647 [duplicate] http://stackoverflow.com/questions/5483357/nsstring-retaincount-is-2147483647 c xcode share improve this question It is 2147483647 because you looked. Don't look and it will be the value you expect. Seriously. Don't call retainCount . Not ever. It is useless. Why it is such a ridiculous number is because of an implementation..
Property vs instance variable in Objective-C [duplicate] http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c accessors for a property will access the ivar with the same name as the property indicates that's the pattern they expect you to follow. No matter what since objects still have to send messages to themselves to access properties it's hard to..
Why am I having to manually set my view's frame in viewDidLoad? http://stackoverflow.com/questions/6757018/why-am-i-having-to-manually-set-my-views-frame-in-viewdidload The reason I have the hack is so that when I layout my subviews into this view they'll be based off of where I expect them to be which is the top left corner just under the navigation bar. What am I doing wrong UPDATE turning off all the..
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