将背景图像添加到UILabel

Question

如何在iPhone应用程序中将背景图像添加到UILabel.我试过通过IB做但没有结果.

Answer 1

尝试使用代码:

Objective-C的:

theLabel.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"blah"]];

迅速:

theLabel.backgroundColor = UIColor(patternImage: UIImage(named: "blah")!)

或者UIImageView在标签后面放置(不推荐).

更新:不推荐在标签后面放置UIImageView,因为那时你必须管理两个视图.但是如果你必须做一些只有UIImageView可以做到的事情,这仍然是一个很好的方法.我怀疑你的应用程序实际上会以这种方式运行得更好.

Answer 2

如果你想要拉伸图像以填充标签宽度.试试这段代码.

UILabel *myLabel=[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 20)];

UIImage *img = [UIImage imageNamed:@"a.png"];
CGSize imgSize = myLabel.frame.size;

UIGraphicsBeginImageContext( imgSize );
[img drawInRect:CGRectMake(0,0,imgSize.width,imgSize.height)];
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

myLabel.backgroundColor = [UIColor colorWithPatternImage:newImage];