Question

我的应用中有大图像。我动态创建它，我想在此图像上添加UILabel：

UIImageView *thumbnailImage;
thumbnailImage = [[UIImageView alloc] initWithFrame:CGRectMake(xImage, yImage, imageWidth, imageHeight)];
UILabel *lblTitle = [[UILabel alloc] init];
lblTitle.text = @"SomeText"; 
lblTitle.frame = CGRectMake(xTitle, yTitle , titleWidth ,titleHeight);
[thumbnailImage setContentMode:UIViewContentModeScaleAspectFill];
thumbnailImage.clipsToBounds = YES;
[thumbnailImage addSubview:lblTitle];

但[thumbnailImage addSubview:UILabel];代码不起作用。

任何人都有任何想法？

Answer 1

我想在图片的底部添加一些文字，如新闻文章。

所以我用下面的代码解决它，如果有任何人有更好的想法请分享。

UIImageView *thumbnailImage;
thumbnailImage = [[UIImageView alloc] initWithFrame:CGRectMake(xImage, yImage, imageWidth, imageHeight)];
UIView *titleView = [[UIView alloc] initWithFrame:CGRectMake(xImage,imageHeight - titleHeight , titleWidth , titleHeight )];
UILabel *lblTitle = [[UILabel alloc] initWithFrame:CGRectMake(xTitle, yTitle , titleWidth ,titleHeight)];
titleView.alpha = 0.3;
[thumbnailImage setContentMode:UIViewContentModeScaleAspectFill];
thumbnailImage.clipsToBounds = YES;
[self.view addSubview:thumbnailImage];
[self.view addSubview:titleView];
lblTitle.textLabel.text = @"SomeText";

首先我使用以下代码行：

 [titleView addSubview:lblTitle]

但titleView的alpha值影响lblTitle并使其透明。删除此行后lblTitle文字显得清晰明亮。

Answer 2

thumbnailImage是一个UIView，所以你可以为它添加子视图。而不是写行

[thumbnailImage addSubview:UILabel];

使用以下::

编辑它

[thumbnailImage addSubview:lblTitle];

这会奏效。：）

Answer 3

最好用它的框架初始化标签。

您应该在标签上添加文字

您应该将UILabel对象（lblTitle）添加到imageview而不是UILabel类型。

通过这些更正，您的代码应如下所示：

UIImageView *thumbnailImage;
thumbnailImage = [[UIImageView alloc] initWithFrame:CGRectMake(xImage, yImage, imageWidth, imageHeight)];
[thumbnailImage setContentMode:UIViewContentModeScaleAspectFill];
thumbnailImage.clipsToBounds = YES;
UILabel *lblTitle = [[UILabel alloc] initWithFrame:CGRectMake(xTitle, yTitle , titleWidth ,titleHeight)];
lblTitle.textLabel.text = @"Your text";
[thumbnailImage addSubview:lblTitle];

如何在UIImageView中添加UILabel

3 个答案: