[英]Swift: Make an image in background of label
我想将标签放入带有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一个)。 为此,我发现了一个类似的问题 。 我测试了这个:
theLabel.backgroundColor = UIColor(patternImage: UIImage(named: "blah")!)
但是我的图像尺寸有问题。 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];
没有最新版本的Xcode(Xcode 8.0), CGRectMake
不可用。
谁能帮我吗?
尝试以下代码:在Swift 3中测试。
答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:
您的目标C代码已更改为Swift 3.0
var myLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 21))
var img = UIImage(named:"a")
var imgSize : CGSize = myLabel.frame.size
UIGraphicsBeginImageContext(CGSize(width: newWidth, height: newHeight))
image.draw(in: CGRect(x: 0, y: 0, width: newWidth, height: newHeight))
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
myLabel.backgroundColor = UIColor(patternImage: newImage)
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