Questions tagged [swift-block]
9 questions
3
votes
1 answer
I get a nil when I use self in block.But self does't free
I use an viewController which inherit BaseViewController. The function "monitorNetworkStatus()" is invoked in BaseViewController's method "viewDidLoad".
private func monitorNetworkStatus() {
ReachabilityManager.shared.startMonitoring { [weak…
gui
- 31
- 2
2
votes
1 answer
Accessing Objective-C block from Swift
I have this Objective-C code in FileManagerHelper:
+(void)getMyVideoObject:(NSString *)videoId completion:(void (^)(MyVideoObject *myVideoObject, NSError *error)) completionBlock
{
}
For calling from Objective-C:
[FileManagerHelper…
user523234
- 14,323
- 10
- 62
- 102
1
vote
1 answer
Update label of collection view Cell when I perform some action on the Previous cell and move to the next cell
I have implemented the collection view with two custom cell
When I press a button on the first cell then scrolling to the second cell in the collectionviiew but I need to change the value of label which is inside the second cell
Let say I have a…
Parth Soni
- 67
- 1
- 6
0
votes
1 answer
Is Weak self required while fetching notification settings of the app
I'm querying notification settings value but I wonder whether [weak self] is necessary.
Someone kindly clarify:
UNUserNotificationCenter.current().getNotificationSettings { [weak self] appsettings in
var mybool = false
if…
D C T
- 39
- 10
0
votes
1 answer
Swift ignoring parameter types defined in block signature
I have the code below, which the compiler is happy with:
func CheckPaintExists(colorCode : String, applicationCode : String) {
let checkRequest = NSFetchRequest(entityName: "Paint")
checkRequest.predicate =…
pnizzle
- 6,243
- 4
- 52
- 81
0
votes
1 answer
Chaining nullable blocks in Objective-C and in Swift?
I need to have a possibility to write:
//if someCase1
block1(block2(block3()))
//if someCase2
block1(block3())
//if someCase3
block2(block3())
where blocks are some blocks of code. I saw a lot of examples but no one describes how to declare…
Vyachaslav Gerchicov
- 2,317
- 3
- 23
- 49
0
votes
1 answer
How to write a block to return value from one class to another?
I searched many questions here but seems no one is for the below question.
I am trying to create a block completion in Swift.
This is an optional variable closure in class X.
var onLogCompletion:((_ logThing:String) -> ())?
This is the function…
Hemang
- 26,840
- 19
- 119
- 186
0
votes
0 answers
How to do a recursive block operation Swift
I'm working with alamofire and I make a request (getPrescriptions) when users open the app which is a block with a completionHandler. That function retrieves a list from ws and can be paginated, but I don't know how many items I have at the…
Gehlen
- 160
- 1
- 15
0
votes
3 answers
Join strings in a block
I have a block that updates the view for each String. In its object class I pass it by:
func eachFeaturesSection(block: ((String?) -> Void)?) {
propertyFeatures.forEach { feature in
guard let feature = feature as? RealmString else {
return
…
Umit Kaya
- 5,771
- 3
- 38
- 52