Block from Objective-C to Swift

Question

I used a framework Objective-C in my Project (Swift). But in the code have a Block, i cannot convert to swift (i'm newbie in swift) So the code is

[self.datePicker setDateHasItemsCallback:^BOOL(NSDate *date) {
    int tmp = (arc4random() % 30)+1;
    return (tmp % 5 == 0);
}];

Please help me. Thank you ,

matt · Accepted Answer · 2015-01-20 05:09:53Z

1

Where you would use a block in Objective-C, you use a function in Swift. In Objective-C, the argument is a block that takes an NSDate and returns a BOOL:

[self.datePicker setDateHasItemsCallback:^BOOL(NSDate *date) {

So, in Swift the argument is a function that takes an NSDate and returns a Bool:

self.datePicker.setDateHasItemsCallback {
    (date:NSDate) -> Bool in
    return true // fix this up as desired
}

answered Jan 20, 2015 at 5:09

matt

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1 Comment

matt Over a year ago

And see my new Swift tutorial if you don't know about anonymous function syntax: apeth.com/swiftBook/ch02.html#_anonymous_functions

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