根据文本内容调整Button大小

xiao_yuly

于 2016-09-27 21:59:43 发布

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分类专栏： iOS_UI 文章标签： uibutton

本文链接：https://blog.youkuaiyun.com/jacob_ios/article/details/52685119

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本文介绍了一种使用Swift在iOS应用中动态创建并布局按钮的方法。通过遍历数据源，在UIScrollView中添加UIButton，并根据按钮标题自动调整宽度和位置，实现水平布局效果。

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CGFloat height = self.scrollView.bounds.size.height;
    CGFloat btnX = 5;
    for (int index = 0; index < dataSource.count; index ++) {
        UIButton *button = [[UIButton alloc] init];
        [self.scrollView addSubview:button];
        [button setTitleColor:[UIColor darkTextColor] forState:UIControlStateNormal];
        [button setTitleColor:[UIColor redColor] forState:UIControlStateSelected];
        button.titleLabel.font = [UIFont systemFontOfSize:16];
        NSString *title = dataSource[index];
        [button setTitle:title forState:UIControlStateNormal];
        //计算宽
        CGSize titleSize = [title sizeWithAttributes:@{NSFontAttributeName: [UIFont fontWithName:button.titleLabel.font.fontName size:button.titleLabel.font.pointSize]}];

    CGFloat    width = titleSize.width+10;

        button.frame = CGRectMake(btnX, 0, width, height);

        [button addTarget:self action:@selector(categoriesBtnAction:) forControlEvents:UIControlEventTouchUpInside];

        btnX += button.frame.size.width;
    }
    self.scrollView.contentSize = CGSizeMake(btnX, height);