Re: [MonoTouch] INotifyPropertyChanged
iOS / Cocoa has the observer pattern baked in, I think. But the only ones I've seen are mostly MVVM, eg https://github.com/RobertKozak/MonoMobile.Views http://slodge.blogspot.co.uk/2012/02/mvvmcross-mvvm-across-wp7-monodroid-and.html On Sun, Aug 5, 2012 at 9:12 PM, Phil Cockfield p...@cockfield.net wrote: In the past, I've always made a lot of use of property change notifications on Models. In .NET I've used the [*INotifyPropertyChanged*] interface and associated class from System.ComponentModel. Before I go blithely diving into adopting this pattern for iOS development - is this something other people do? Or in iOS is that discouraged. What are common ways for implementing property change observation patterns around models in this world. Thanks! -- *Phil *Cockfield ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch -- Nic Wise t. +44 7788 592 806 | @fastchicken | http://www.linkedin.com/in/nicwise b. http://www.fastchicken.co.nz/ mobileAgent (for FreeAgent): get your accounts in your pocket. http://goo.gl/IuBU Trip Wallet: Keep track of your budget on the go: http://goo.gl/ePhKa Earnest: Self-employed? Track your business expenses and income. http://earnestapp.com Nearest Bus: find when the next bus is coming to your stop. http://goo.gl/Vcz1p London Bike App: Find the nearest Boris Bike, and get riding! http://goo.gl/Icp2 ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch
[MonoTouch] How to show an imagegallery in IPAD application --
Greetings of the day. I have a situation which I'll try to describe in details in the next few paragraphs. In my ipad application, I have images for an assembly [like cranes, crawlers, loaders, forklifts, backhoe, excavator etc] stored as byte arrays in my sqlite database. On my view controller, I have a tableview enlisting the different assemblies available. There are several buttons with different functionalities one of which is a 'View Photographs' button. When I make a selection from the tableview and click on this button, all the images of that particular assembly are supposed to be presented in a sleek, stylish pop up gallery with option for moving front and back [like we have the lightbox and other such galleries in asp.net]. I don't want to navigate to an entirely new view controller for the purpose of presenting the images. Hence the idea of a pop up gallery. I hope you understand what I'm trying to create. Kindly see attached image for ease of understanding. http://monotouch.2284126.n4.nabble.com/file/n4656388/pic.png Now I have figured out the part regarding fetching the byte arrays from database and converting them back to uiimage type. What I don't know is how to present the set of images in the form of a pop up gallery that I mentioned above. I am relatively new to IOS development. As such having problems implementing this in my sample application. That's why I turned to the forums for technical help. Kindly help me by proving some links to useful articles or tutorials or better still some target specific code blocks. You can also PM me if you would like to correspond with me through email. Look forward eagerly to receiving some technical help on this matter in the earnest. Many Thanks in anticipation. -- View this message in context: http://monotouch.2284126.n4.nabble.com/How-to-show-an-imagegallery-in-IPAD-application-tp4656388.html Sent from the MonoTouch mailing list archive at Nabble.com. ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch
Re: [MonoTouch] WebClient memory issues
On Mon, Aug 6, 2012 at 5:37 AM, Sebastien Pouliot sebast...@xamarin.comwrote: Hello Matthieu, On Sun, Aug 5, 2012 at 2:34 PM, Matthieu Laban m...@flyingdevelopmentstudio.com wrote: Hello Guys, My quest for leaks continues... I'm downloading files from our server, and the size of the files can vary between 1 and 20 MB. The issue is that after the file is downloaded, the app's dirty size goes up ~20MB and never goes down even if I dispose the WebClient, remove all event listeners and call GC.Collect(). The easiest way to reduce your dirty memory [1] is to reduce your allocations [2]. [1] http://stackoverflow.com/q/5176074/220643 [2] http://stackoverflow.com/q/6471435/220643 Yup, we've already been reducing allocations a lot. Thanks for the links :) How can I make sure some of that memory is reclaimed. We're tight on memory on the iPod Touch and we'd love to get some of it back :) I suggest a small change of design to minimize your memory requirements: 1. Avoid keeping data in memory. 1.1. The ZIPped data is likely not useful to keep around, i.e. it won't be used until decompressed (into one or several files), but even if it was... I'd love to but I never even access the byte[] that has been downloaded in this case. 1.2. The 20MB download may take quite some time (e.g. cellular) and you do not want to hold on to large memory blocks for long times (e.g. be nice to other running applications); After watching the talk at WWDC 2012 on memory, that's the thing I'm trying to do now, avoid spikes of memory allocations. 2. Keep using WebClient as it is simpler than HttpWebRequest - but instead of using DownloadData use DownloadFile [1] to a temporary location. That will download your ZIP file in chunks of 32KB, lowering your app memory requirements, and the file can be decompressed later (e.g. using streams to avoid loading it into memory) and then deleted. Speaking of streams an alternative would be use a OpenRead to get a Stream and process data, in small chunks, as it comes in. You get more control this way (if you need it) but you'll likely end up duplicating DownloadFile. [1] https://github.com/mono/mono/blob/mono-2-10/mcs/class/System/System.Net/WebClient.cs#L299 Thanks, I'll try these. I think I had tried one of those in the past but the progress event was never fired, so I had to switch to a different method. -- Matt ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch
Re: [MonoTouch] WebClient memory issues
Using DownloadFile instead of DownloadData did solve my problem. Memory usage is staying low and I don't see many allocations being done during the download. Thanks again for your help, Matt On Mon, Aug 6, 2012 at 8:55 AM, Matthieu Laban m...@flyingdevelopmentstudio.com wrote: On Mon, Aug 6, 2012 at 5:37 AM, Sebastien Pouliot sebast...@xamarin.comwrote: Hello Matthieu, On Sun, Aug 5, 2012 at 2:34 PM, Matthieu Laban m...@flyingdevelopmentstudio.com wrote: Hello Guys, My quest for leaks continues... I'm downloading files from our server, and the size of the files can vary between 1 and 20 MB. The issue is that after the file is downloaded, the app's dirty size goes up ~20MB and never goes down even if I dispose the WebClient, remove all event listeners and call GC.Collect(). The easiest way to reduce your dirty memory [1] is to reduce your allocations [2]. [1] http://stackoverflow.com/q/5176074/220643 [2] http://stackoverflow.com/q/6471435/220643 Yup, we've already been reducing allocations a lot. Thanks for the links :) How can I make sure some of that memory is reclaimed. We're tight on memory on the iPod Touch and we'd love to get some of it back :) I suggest a small change of design to minimize your memory requirements: 1. Avoid keeping data in memory. 1.1. The ZIPped data is likely not useful to keep around, i.e. it won't be used until decompressed (into one or several files), but even if it was... I'd love to but I never even access the byte[] that has been downloaded in this case. 1.2. The 20MB download may take quite some time (e.g. cellular) and you do not want to hold on to large memory blocks for long times (e.g. be nice to other running applications); After watching the talk at WWDC 2012 on memory, that's the thing I'm trying to do now, avoid spikes of memory allocations. 2. Keep using WebClient as it is simpler than HttpWebRequest - but instead of using DownloadData use DownloadFile [1] to a temporary location. That will download your ZIP file in chunks of 32KB, lowering your app memory requirements, and the file can be decompressed later (e.g. using streams to avoid loading it into memory) and then deleted. Speaking of streams an alternative would be use a OpenRead to get a Stream and process data, in small chunks, as it comes in. You get more control this way (if you need it) but you'll likely end up duplicating DownloadFile. [1] https://github.com/mono/mono/blob/mono-2-10/mcs/class/System/System.Net/WebClient.cs#L299 Thanks, I'll try these. I think I had tried one of those in the past but the progress event was never fired, so I had to switch to a different method. -- Matt ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch
Re: [MonoTouch] How to write bindings for a framework?
Ok let me see if I understood correctly We manually create a folder named Resources in our MT binding project Then we add the xName.bundle to that folder and any resource files included on the framework Then We compile and everything gets added to the bindingfile.dll file and that it. Do we have to mark the files we add to Resources folder as Content or Resource?? Thanks Jeff Alex El 06/08/2012, a las 04:08 p.m., Jeff Stedfast j...@xamarin.com escribió: Hi Shawn, I recently added feature which adds a Resources folder where you can add things like the ArcGIS.bundle files. I think it landed in MonoDevelop 3.0.4 (you'll have to create the Resources folder manually, though) Jeff On Mon, Aug 6, 2012 at 3:50 PM, spcware sh...@spcware.com wrote: I am not sure I follow your reply. I was giving multiple options, yet you said it all sounded correct. Let me add some specifics. I am trying to use the ESRI ArcGIS thirdparty framework. I have already started writing the ApiDefinition.cs file to wrap the Objective-C code in C# bindings. It is working well. However, the ArcGIS ships as a framework and a Resources directory containing both a ArcGIS.bundle and Info.plist file. In normal Objective-C xcode world, they state to add the ArcGIS.bundle file to the xcode project and add a dependency on the ArcGIS.framework. I know that the code in the ArcGIS.framework uses resources from the ArcGIS.bundle when rendering its UI. So the question is how to get those resources available to the wrapped ArcGIS.dll that I create? I tried added the ArcGIS.bundle (really a directory) to my top level ios Monotouch application project as a directory. That helped a little in that my app can now see some of the resources, but not all. The ESRI map component is supposed to have esri in the bottom left corner of the MapView which is just one of the images in the ArcGIS.bundle. It is NOT finding this image, however, it is finding the GpsLocation.png image used to show the current device location on the map. I am confused as to how some of the images in the ArcGIS.bundle can be found, yet some cannot. Also, do I have to use the Info.plist file at all?? -- View this message in context: http://monotouch.2284126.n4.nabble.com/How-to-write-bindings-for-a-framework-tp4656293p4656400.html Sent from the MonoTouch mailing list archive at Nabble.com. ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch
Re: [MonoTouch] How to write bindings for a framework?
that was also one of my questions. do we do this to the binding project that produces the dll or the top level application project that produces the iap? ___ Shawn On Aug 6, 2012, at 6:53 PM, Alex Soto dxdr...@gmail.com wrote: Ok let me see if I understood correctly We manually create a folder named Resources in our MT binding project Then we add the xName.bundle to that folder and any resource files included on the framework Then We compile and everything gets added to the bindingfile.dll file and that it. Do we have to mark the files we add to Resources folder as Content or Resource?? Thanks Jeff Alex El 06/08/2012, a las 04:08 p.m., Jeff Stedfast j...@xamarin.com escribió: Hi Shawn, I recently added feature which adds a Resources folder where you can add things like the ArcGIS.bundle files. I think it landed in MonoDevelop 3.0.4 (you'll have to create the Resources folder manually, though) Jeff On Mon, Aug 6, 2012 at 3:50 PM, spcware sh...@spcware.com wrote: I am not sure I follow your reply. I was giving multiple options, yet you said it all sounded correct. Let me add some specifics. I am trying to use the ESRI ArcGIS thirdparty framework. I have already started writing the ApiDefinition.cs file to wrap the Objective-C code in C# bindings. It is working well. However, the ArcGIS ships as a framework and a Resources directory containing both a ArcGIS.bundle and Info.plist file. In normal Objective-C xcode world, they state to add the ArcGIS.bundle file to the xcode project and add a dependency on the ArcGIS.framework. I know that the code in the ArcGIS.framework uses resources from the ArcGIS.bundle when rendering its UI. So the question is how to get those resources available to the wrapped ArcGIS.dll that I create? I tried added the ArcGIS.bundle (really a directory) to my top level ios Monotouch application project as a directory. That helped a little in that my app can now see some of the resources, but not all. The ESRI map component is supposed to have esri in the bottom left corner of the MapView which is just one of the images in the ArcGIS.bundle. It is NOT finding this image, however, it is finding the GpsLocation.png image used to show the current device location on the map. I am confused as to how some of the images in the ArcGIS.bundle can be found, yet some cannot. Also, do I have to use the Info.plist file at all?? -- View this message in context: http://monotouch.2284126.n4.nabble.com/How-to-write-bindings-for-a-framework-tp4656293p4656400.html Sent from the MonoTouch mailing list archive at Nabble.com. ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch
Re: [MonoTouch] MT.Dialog: Selected Event while in Edit Mode
Cool. Thanks Nic. On Mon, Aug 6, 2012 at 9:50 PM, Nic Wise n...@fastchicken.co.nz wrote: I suspect it's a custom cell. I'm not 100% sure how they'd do it without custom-drawing everything (ie, not using a grouped tableview type), but it looks like a one-off :) If you have an image, you may need to EnableInteraction (or something similar) in order for it to receive taps. Same with UILabels. On Sun, Aug 5, 2012 at 9:01 PM, Phil Cockfield p...@cockfield.net wrote: Hey *Nic*, No, what I mean is when a *Contact* is in edit mode. If you put a Contact into Edit mode, then scroll down to the bottom you'll see (for example) the *( + ) add field* cell. Both the ( + ) icon AND the cell (add field) is tappable. Not so in MT.Dialog. The *selected* method is never getting called from the *DVC*. Any ideas? On Sun, Aug 5, 2012 at 11:08 PM, Nic Wise n...@fastchicken.co.nz wrote: I always thought the contact editing was 2 forms. You had one for display, and one for editing - rather than it being the editing mode of the same form. Could be wrong tho :) On Sun, Aug 5, 2012 at 10:36 AM, Phil Cockfield p...@cockfield.netwrote: In *MT.Dialog* I would like to react when a cell (Element) is selected WHILE the table is in edit mode. It appears that the DVC is never invoking the Selected method while in the edit state ( eg. TableView.*SetEditing*( true, true ); ) The reason I want to do this is to achieve the same effect as in the iOS Contacts app with + Add New Address or + Add Field (with the Plus/Insert icon visible). It will be confusing for the user to only hit the ( + ) icon, when the whole cell look like a hit target. Anyway to do this? Thanks! -- *Phil *Cockfield ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch -- Nic Wise t. +44 7788 592 806 | @fastchicken | http://www.linkedin.com/in/nicwise b. http://www.fastchicken.co.nz/ mobileAgent (for FreeAgent): get your accounts in your pocket. http://goo.gl/IuBU Trip Wallet: Keep track of your budget on the go: http://goo.gl/ePhKa Earnest: Self-employed? Track your business expenses and income. http://earnestapp.com Nearest Bus: find when the next bus is coming to your stop. http://goo.gl/Vcz1p London Bike App: Find the nearest Boris Bike, and get riding! http://goo.gl/Icp2 -- *Phil *Cockfield -- Nic Wise t. +44 7788 592 806 | @fastchicken | http://www.linkedin.com/in/nicwise b. http://www.fastchicken.co.nz/ mobileAgent (for FreeAgent): get your accounts in your pocket. http://goo.gl/IuBU Trip Wallet: Keep track of your budget on the go: http://goo.gl/ePhKa Earnest: Self-employed? Track your business expenses and income. http://earnestapp.com Nearest Bus: find when the next bus is coming to your stop. http://goo.gl/Vcz1p London Bike App: Find the nearest Boris Bike, and get riding! http://goo.gl/Icp2 -- *Phil *Cockfield ___ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch
