You should try:
```
class Test<T: NSObject> {
let array: [T] = []
. . .
```
Because when you declare `class Test<NSObject>`, NSObject is the generic
parameter, no longer the class.
Pierre
> Le 26 janv. 2017 à 02:45, Doug Hill via swift-users <[email protected]> a
> écrit :
>
> Unfortunately, this is for a work-related project, not just research, so I'm
> looking for solutions to specific problems that I'll need for my work.
>
> I guess I'll have to file this one away as broken in Swift 2.x
>
> Doug
>
>> On Jan 25, 2017, at 5:28 PM, Zhao Xin <[email protected]> wrote:
>>
>> I think in swift 2.x, the `Array` is not mature enough to do a lot of
>> things. Besides, `NSArray` can also hold non-NSObjects like Int, for
>> example.
>>
>> I suggest you to use the latest Swift to do your research. As in Swift,
>> everything moves fast and changes a lot. In the latest Xcode beta, all swift
>> 2.x are abandoned. The latest stable swift is 3.0.2 and 2.3. The next
>> release will be swift 3.1.
>>
>> Zhaoxin
>>
>>> On Thu, Jan 26, 2017 at 9:17 AM, Doug Hill <[email protected]> wrote:
>>> I'm guessing that conversion of a Swift array to an NSArray can only happen
>>> if the Swift array holds NSObjects. So, I tried changing the type parameter
>>> of my class to NSObject:
>>>
>>> class Test<NSObject>
>>> {
>>> let array = [NSObject]()
>>>
>>> init() {
>>> let temp = self.array as NSArray
>>> }
>>> }
>>>
>>> error: cannot convert value of type '[NSObject]' to type 'NSArray' in
>>> coercion
>>> var temp = self.array as NSArray
>>> ~~~~~^~~~~
>>>
>>> However, if I change the type parameter to something else it compiles with
>>> no problem.
>>>
>>> class Test<T>
>>> {
>>> let array = [NSObject]()
>>>
>>> init() {
>>> let temp = self.array as NSArray
>>> }
>>> }
>>>
>>>
>>> I guess this is interesting, but I still can't create an array with items
>>> whose type is the type parameter of the class and then convert to NSArray.
>>>
>>> Doug Hill
>>>
>>>
>>>> On Jan 25, 2017, at 10:49 AM, Doug Hill <[email protected]> wrote:
>>>>
>>>> OK, I just tried testing this code in my app and a Swift playground. I
>>>> also tried a variation on the initializer just for the heck of it. I get
>>>> the following error:
>>>>
>>>> class Test<T>
>>>> {
>>>> var array:[T] = []
>>>> var array2 = [T]()
>>>>
>>>> init() {
>>>> var temp = self.array as NSArray
>>>> var temp2 = self.array2 as NSArray
>>>> }
>>>> }
>>>>
>>>> error: cannot convert value of type '[T]' to type 'NSArray' in coercion
>>>> var temp = self.array as NSArray
>>>> ~~~~~^
>>>> error: cannot convert value of type '[T]' to type 'NSArray' in coercion
>>>> var temp2 = self.array2 as NSArray
>>>> ~~~~~^
>>>>
>>>> Are there restrictions on what can be converted to NSArray?
>>>>
>>>> Doug Hill
>>>>
>>>>> On Jan 25, 2017, at 9:24 AM, Doug Hill via swift-users
>>>>> <[email protected]> wrote:
>>>>>
>>>>> Thanks for the help. I'm still trying to figure out how Swift works,
>>>>> particularly what the error messages mean. This has been driving me a
>>>>> little nuts trying to figure out what is wrong via sometimes cryptic
>>>>> errors. Also, it seems like getting generic programming working in Swift
>>>>> is more difficult than I'm used to (even than C++!) so this answer helps
>>>>> figure out how the compiler works.
>>>>>
>>>>> Doug Hill
>>>>>
>>>>>
>>>>>> On Jan 23, 2017, at 7:04 PM, Zhao Xin <[email protected]> wrote:
>>>>>>
>>>>>> It seems to me that you didn't initialize your `myArray` before you
>>>>>> casted it. That caused the problem.
>>>>>>
>>>>>> Zhaoxin
>>>>>>
>>>>>>> On Tue, Jan 24, 2017 at 9:34 AM, Jon Shier via swift-users
>>>>>>> <[email protected]> wrote:
>>>>>>> enumerateObjects(options:using:) exists on NSArray in Swift. And I was
>>>>>>> able to create your generic class just fine:
>>>>>>>
>>>>>>> class Test<T> {
>>>>>>> var array: [T] = []
>>>>>>>
>>>>>>> init() {
>>>>>>> var temp = array as NSArray
>>>>>>> }
>>>>>>> }
>>
>
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