如何在文本字段中找到字符串UITextInput创建（或长度）？ （迅速）

Question

I'm trying to delete an entire word in a text field when I do a long press on the delete key.

I attempted to run a while loop to check for a space (" "), and then delete any char that did not match space (" ") - but...

1) I am not sure if how I'm attempting to search the text field is correct

2) The way I'm attempting my loop is broken because of that

func delLong(){
    var proxy = textDocumentProxy as UITextDocumentProxy
    while [-1] != " "{
        proxy.deleteBackward()
    }
}

Answer 1

I haven't tested, but you can try:

func delLong(){
    var proxy = textDocumentProxy as UITextDocumentProxy
    while proxy.hasText() {
        let beforeText = proxy.documentContextBeforeInput
        if beforeText.isEmpty || beforeText.hasSuffix(" ") {
            break
        }
        proxy.deleteBackward()
    }
}