兼容textFieldDidEndEditing

[Xiaoming]

根据苹果API注释

- (void)textFieldDidEndEditing:(UITextField *)textField reason:(UITextFieldDidEndEditingReason)reason NS_AVAILABLE_IOS(10_0); 
// if implemented, called in place of textFieldDidEndEditing:

建议作以下修改，这样才能遵循苹果原来的代理调用顺序，否则真正代理只实现了textFieldDidEndEditing的时候并不能被调用。

- (void)textFieldDidEndEditing:(UITextField *)textField reason:(UITextFieldDidEndEditingReason)reason NS_AVAILABLE_IOS(10_0) {
    id realDelegate = self.realDelegate;
    if (realDelegate) {
        if ([realDelegate respondsToSelector:@selector(textFieldDidEndEditing:reason:)])
            [realDelegate textFieldDidEndEditing:textField reason:reason];
        else if ([realDelegate respondsToSelector:@selector(textFieldDidEndEditing:)])
            [realDelegate textFieldDidEndEditing:textField];
    }
}

[tingxins]

👍已修复此问题，欢迎 PR。