尝试以编程方式使退格按钮与键盘删除（ᗏX）按钮相同

Question

aes_256_cbc

还尝试了两个退格键

@objc func searchButtonTap() { 
    searchBar.becomeFirstResponder()
    var remove = searchBar.text
    remove = String(remove!.dropLast())
    searchBar.text = remove 
}

Answer 1

假设您要在用户点击后退（搜索？）按钮时删除搜索栏文本的最后一个字符。 因此，

@objc func searchButtonTap() { 
    guard !(searchBar.text?.isEmpty ?? true) else { return } //Making sure that you don't hit the "Fatal error: Can't remove more items from a collection than it contains"
    searchBar.text?.removeLast(1)
}