ios - 如何从 iOS 中的另一个类访问标签上的按钮？

Question

我有一个按钮:

- (UIButton *)subwayABBtn
{
    if (!_subwayABBtn)
    {
        _subwayABBtn = [UIButton buttonWithType:UIButtonTypeCustom];

        _subwayABBtn.tag = ADRESS_SUBWAY_BTN_TAG;

        [_subwayABBtn setTitle:@"Метро" forState:UIControlStateNormal];
        [_subwayABBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

        [self.contentView addSubview:_subwayABBtn];
    }

    return _subwayABBtn;
}

如何使用另一个类的标签更改按钮的标题？我需要更改按钮的标题。

Answer 1

您需要引用 View Controller 中的其他类，在其头文件中声明按钮并使用方法-viewWithTage:

示例:

OtherClass *otherClass; // This should be set from previous class and a property in your current class 
UIButton *buttonFromOtherClass = [otherClass viewWithTag:BUTTON_TAG]; 
[buttonFromOtherClass setTitle:@"Метро" forState:UIControlStateNormal];