如何在UIImageView中添加UILabel

Question

i have big Image in my app. i create it dynamically and i want to add a UILabel on this image:

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];

but the [thumbnailImage addSubview:UILabel]; code does not work.

any one have any idea?

Answer 1

I want to add some text on bottom of picture like news article.

so I solve it with below code, if any one have a better idea please share it.

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";

first I use below line of Code:

 [titleView addSubview:lblTitle]

but the alpha of titleView impact lblTitle and made it transparent. so after delete this line lblTitle Text appear clear and bright.

Answer 2

thumbnailImage is a UIView, so you can add subviews to it.instead of writing the line

[thumbnailImage addSubview:UILabel];

edit it with the following ::

[thumbnailImage addSubview:lblTitle];

This will work . :)

Answer 3

It's better to initialize the label with it's frame.

You should add a text to the label

You should add the UILabel object ( lblTitle ) to the imageview instead of the UILabel type.

With these corrections, your code should look like this:

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];