outlet | 易学教程

Objective C terminology: outlets & delegates

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问题 I'm having issues understanding the concept of outlets how the iPhone deals with events. Help! Delegates confuse me too. Would someone care to explain, please? 回答1: Outlets (in Interface Builder) are member variables in a class where objects in the designer are assigned when they are loaded at runtime. The IBOutlet macro (which is an empty #define ) signals Interface Builder to recognise it as an outlet to show in the designer. For example, if I drag out a button, then connect it to the

Targeting named outlet via routerLink adds extraneous “/”

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I'm trying to launch a modal in my app via routing. Everything seems to work except that an extra slash is added to the URL that prevents it from resolving. The Url should look like this (and it works if I enter it manually)... /accounts(modal:accounts/1/edit) but i'm getting this instead (notice the slash between the base url and outlet target)... /accounts/(modal:accounts/1/edit) The base tag is set... <head> <meta charset="utf-8"> <title>myApp</title> <base href="/"> ... </head> Here's my routing config (accounts-routing.module.ts) const ACCOUNT_ROUTES: Routes = [ { path: 'accounts',

Ember.js — How do I target outlets in nested/repeated views, and what are the best practices for such a ui layout?

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问题 I'm working on refactoring an inherited Ember application, with quite a bit of non-mvc disorder to it. I'm looking to keep things as modular as possible, and am hoping to reuse various ui components in multiple screens to help prevent code duplication. It seems like outlets are the best way to do this. Right now, I have a UI displaying a number of elements, each rendered using a templatized view. {{#each item in controller}} {{view App.ItemThumbView}} {{/each}} The right sidebar of this view

Ember.js — How do I target outlets in nested/repeated views, and what are the best practices for such a ui layout?

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I'm working on refactoring an inherited Ember application, with quite a bit of non-mvc disorder to it. I'm looking to keep things as modular as possible, and am hoping to reuse various ui components in multiple screens to help prevent code duplication. It seems like outlets are the best way to do this. Right now, I have a UI displaying a number of elements, each rendered using a templatized view. {{#each item in controller}} {{view App.ItemThumbView}} {{/each}} The right sidebar of this view is an outlet that changes based on the selection. When I select an item, I would like to display a list

App terminating due to uncaught exception NSUnknownKey Exception , key value not coding compliant [duplicate]

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This question already has an answer here: Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant for the key X" error? 67 answers Sorry for asking such an easy question, but im a beginner I was following a tutorial on building apps. I was creating a button, but i accidently named it wrong, i named it instead of when creating the outlet. I named it right though when i created the action. I ran my app and it failed, because my instances called on , not (at least i think thats why my app crashed. So deleted the outlet and and the automatic code xcode

When/How - Outlet -> didSet

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I'm wondering, when/how does the didSet on an outlet actually trigger? For example : @IBOutlet weak var modifyButton: UIButton! { didSet { modifyButton.layer.cornerRadius = 9 } } Outlet properties initialized as nil when class just initialized. They will have values later, when objects will be initialized from nib. First step, when you can be sure that all properly configured outlet properties have nonnil values is viewDidLoad . So, didSet observer on this properties will be called just before viewDidLoad . Because all of this you need to be careful with outlet properties: for example you will

Ember.js multiple, named outlet usage

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I have an application, which will have a view layer organized in three parts: Sidebar Toolbar-left Toolbar-right I have spent may last few hours with trying to find something helpful with google, but I had no luck. I would need a short and complete application example on how to do this using Router and connectOutlet, with named outlets. Thx ahead. With the new Router you can do something like this: {{outlet "menu"}} {{outlet}} In your Route you can handle the content of the outlets: // application route Ember.Route.extend({ renderTemplate: function() { // Render default outlet this.render(); /

Ember.js multiple, named outlet usage

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问题 I have an application, which will have a view layer organized in three parts: Sidebar Toolbar-left Toolbar-right I have spent may last few hours with trying to find something helpful with google, but I had no luck. I would need a short and complete application example on how to do this using Router and connectOutlet, with named outlets. Thx ahead. 回答1: With the new Router you can do something like this: {{outlet "menu"}} {{outlet}} In your Route you can handle the content of the outlets: //

How do I add an action or outlet to a class in Xcode 4.3.1?

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问题 I'm following a slightly outdated the guide from cocoalab.com (Become An Xcoder) to learn the basics of cocoa, but I'm stuck on one of the instructions. On page 45 (section 08:9) in the section titled "Creating connections", it tells me to select the instance of my new class, and from the identity inspector, to add two actions and an outlet. I'm using Xcode 4.3.1 which is obviously a bit different to the version that this tutorial was written for, but I can't figure out how to do the

Unable to make outlet connection to a constraint in IB

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I am running XCode 5 with iOS 7. I need to dynamically change the height constraint of a UITextView prior to its layout. I have seen many postings stating that this can be done by making an outlet connection from the constraint in IB to the source code. I am trying to make the connection from the constraint outlet in IB to the header file of the owning class, but am unable to make the connection - IB does not "highlight" when I drag over the header file, as it does when making connections from other objects like buttons etc. Has anyone encountered this before? All help is greatly appreciated.