Feature request: Pull-to-refresh ListView about nativescript HOT 16 CLOSED

From @hshristov on April 13, 2015 7:41

Hi truongsinh,
Could you try to remove the "" around myRefresh method? e.g.

public myRefresh (sender: UIRefreshControl) {
...
}

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From @truongsinh on April 13, 2015 18:38

@hshristov I tried that before. The only reason I used "" is to have "myRefresh:" instead of "myRefresh". However, I believe when transpiling to ES5, it's the same!

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From @truongsinh on April 13, 2015 18:40

Take a look at http://docs.nativescript.org/runtimes/ios/how-to/ObjC-Subclassing, search for

// A native class with the name "JSObject" will be registered, so it should be unique
class JSObject extends NSObject implements NSCoding {
    public encodeWithCoder(aCoder) { /* ... */ }

    public initWithCoder(aDecoder) { /* ... */ }

    public "selectorWithX:andY:"(x, y) { /* ... */ }

    // An array of protocols to be implemented by the native class
    public static ObjCProtocols = [ NSCoding ];

    // A selector will be exposed so it can be called from native.
    public static ObjCExposedMethods = {
        "selectorWithX:andY:": { returns: interop.types.void, params: [ interop.types.id, interop.types.id ] }
    };
}

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From @hshristov on April 14, 2015 6:43

@truongsinh There are a lot of examples in the cross platform modules were we expose methods that are called from ObjC. Please take a look at Button.ios.ts.

https://github.com/NativeScript/cross-platform-modules/blob/master/ui/button/button.ios.ts

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From @truongsinh on April 14, 2015 6:48

Thanks. I tried to imitate those examples, but always got Segmentation Fault: 11. Do you think it is because of something wrong with my script (i.e. if I write NativeScript correctly it will work), or with the logic itself (i.e. if I write that logic in ObjC, I still have Segmentation Fault: 11)?

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From @PanayotCankov on April 17, 2015 11:40

addTargetActionForControlEvents keeps internally a weak reference, when the GC collects the rHandler the native object used as target is gone, its deallocated, calls to its methods result in seg fault. etc. Would you try keeping the rHandler in a var in the module, that would keep it alive.

E.g. move the "var rHandler" outside the pageLoaded function, or even export it on the module?

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From @truongsinh on April 17, 2015 17:22

I will try in a moment!

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From @truongsinh on April 17, 2015 17:41

@PanayotCankov yes it works, thank you very much! I'll keep this issue open and try to make a PR for this feature, as I believe it is quite popular!

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Will be available as a plug-in when http://plugins.telerik.com/ is ready.

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Roadmap @enchev? and this control could be used in other page without ListView? Sometimes we need to refresh data in a page detail.

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My suggestion actually was to @truongsinh to create plugin instead this pull request. In this way we will not break the current ListView.

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@danicomas Pull to refresh will be available later this month for the Telerik ListView, part of the Telerik UI for NativeScript. @ginev can share more.

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@valentinstoychev and Will we be able to use it in other page without ListView?

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@danicomas not in this first version. But I love the idea! We should be able to easily implement it. Do you want to open a separate issue for this so that it doesn't get lost?

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@valentinstoychev issue created

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This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

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