ios - Swift:在标签背景中制作图像

Question

我想将标签放入一个带有圆角半径的红色矩形的图像中(条件是图像尺寸必须等于或略大于标签尺寸)。为此，我找到了一个类似的 question .我测试了这个:

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

但是我对图像大小有疑问。所以我测试了第二个答案:

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];

使用最新版本的 Xcode (Xcode 8.0) CGRectMake 不可用。

谁能帮帮我？

Answer 1

试试这个代码:在 Swift 3 中测试。

答案 1:

override func viewDidLoad() {
    super.viewDidLoad()

    let label = UILabel()
    label.frame = CGRect(x:0, y:0, width:imageView.frame.width , height:imageView.frame.height)
    label.text = "Some Title"
    label.textAlignment = .center
    label.textColor = .yellow
    label.font = UIFont(name: "HelveticaNeue-medium", size: CGFloat(20))
    imageView.addSubview(label)
}

输出:

答案 2: 已更新

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    imageView.layer.cornerRadius = 10
    imageView.layer.masksToBounds = true

    let label = UILabel()
    label.frame = CGRect(x:0, y:0, width:imageView.frame.width , height:imageView.frame.height)
    label.text = "Some Title"
    label.textAlignment = .center
    label.textColor = .yellow
    label.layer.borderColor  = UIColor.red.cgColor
    label.layer.cornerRadius = 10
    label.layer.masksToBounds = true
    label.layer.borderWidth = 5
    label.font = UIFont(name: "HelveticaNeue-medium", size: CGFloat(26))

    imageView.addSubview(label)
}

注意:您需要调整图像大小和标签字体大小。

输出: