目標C-添加shouldChangeTextInRange后未調用UIsearchBar的searchBarSearchButtonClicked委托

Question

我正在嘗試實現UISearchBar委托

-(BOOL)searchBar:(UISearchBar *)searchBar shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)string{

    NSCharacterSet *set = [[NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzQWERTYUIOPLKJHGFDSAZXCVBNM0123456789!@#$%^&*()_+./?'\"\\*- "] invertedSet];

    const char * _char = [string cStringUsingEncoding:NSUTF8StringEncoding];

    string = [[string componentsSeparatedByCharactersInSet:set] componentsJoinedByString:@""];

    int isBackSpace = strcmp(_char, "\b");

    if((string!=nil && ![string isEqualToString:@""]) || isBackSpace == -8)
    {
        return YES;
    }

    return NO;

}

並單擊搜索按鈕

-(void) searchBarSearchButtonClicked:(UISearchBar *)searchBarSender{[mySearchBar resignFirstResponder];

}

但是searchBarSearchButtonClicked委托不會被觸發。

我試着刪除shouldChangeTextInRange然后被調用。 我做錯了什么？

Answer 1

在這里找到答案

這是由於我沒有在允許的字符中傳遞\\ n字符，並且搜索使用了\\ n被調用。