Question

float newY = 0;
CGRect buttonFrame;
for(int i=1; i<=countTabItems;i++){
    id item = [self viewWithTag:i];
    if([item isKindOfClass:[UIButton class]]){
        UIButton *button = item;
        [item release];
        NSLog(@"got %@", button.titleLabel.text);
        buttonFrame = button.frame;
        buttonFrame.size.height = self.frame.size.height/countTabItems;
        buttonFrame.size.width = self.frame.size.width;
        buttonFrame.origin.x = 0;
        buttonFrame.origin.y = newY;

        button.frame = buttonFrame;
        [button setTitle:@"TEST" forState:UIControlStateNormal];
        NSLog(@"%0.2f",newY);
        [button release];
        newY += frame.size.height/countTabItems;
    }
}

有人可以告诉我这段代码有什么问题吗。我使用它来从原始位置移动按钮，之后UIButton没有显示任何标题（文本）。

Answer 1

[self viewWithTag:i];不会保留任何内容，因此项目对象的释放不应该存在。对于按钮对象的释放也是如此。尝试删除这两个版本，看看它是否解决了您的问题。

移动UIButton后文本不可见

1 个答案: