Ios 如何在UIImageView中添加UILabel
我的应用程序中有大图像。我动态创建它,并希望在此图像上添加UILabel:Ios 如何在UIImageView中添加UILabel,ios,objective-c,uiimageview,uilabel,Ios,Objective C,Uiimageview,Uilabel,我的应用程序中有大图像。我动态创建它,并希望在此图像上添加UILabel: UIImageView *thumbnailImage; thumbnailImage = [[UIImageView alloc] initWithFrame:CGRectMake(xImage, yImage, imageWidth, imageHeight)]; UILabel *lblTitle = [[UILabel alloc] init]; lblTitle.text = @"SomeText"; lbl
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];
但是[thumbnailImage addSubview:UILabel]代码>代码不起作用
有人知道吗?thumbnailImage是一个UIView,因此您可以向其中添加子视图,而不是写行
[缩略图图像添加子视图:UILabel]代码>
使用以下命令编辑它:
[thumbnailImage addSubview:lblTitle];
这将起作用。:) 最好用框架初始化标签
您应该向标签添加文本
您应该将UILabel
对象(lblTitle
)添加到imageview,而不是UILabel
类型
通过这些更正,您的代码应该如下所示:
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];
我想在图片底部添加一些文本,比如新闻文章
所以我用下面的代码来解决它,如果有人有更好的想法,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]
但是标题视图的alpha影响lblTitle
并使其透明。因此,删除这一行后,文本将变得清晰明亮 在哪里设置标签的文本?除非指定不透明的背景颜色,否则不会显示空标签。您正在添加UILabel而不是lblTitleUILabel,并为lable设置文本,因为它键入了misstake。我编辑它们。标签的框架是否在图像视图中?图幅位于其Superview的坐标中。我在代码中做了一些更正。事实上,我想在图片底部的透明区域添加一些文本,比如新闻文章。