我有一个Label,它动态地从数据库中获取一些数据。 这些数据是字符串,有时可以是3-4-5行等。 所以这个labe在UIView里面。
--UIView
--Label
如何让UIView
获取Label动态的某个高度?
答案 0 :(得分:3)
答案 1 :(得分:2)
贝娄正在解决您的问题。我用了autoLayout
。在testView
中,您未设置heightAnchor
let testView: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
view.backgroundColor = UIColor.redColor()
return view
}()
let testLabel: UILabel = {
let label = UILabel()
label.numberOfLines = 0
label.translatesAutoresizingMaskIntoConstraints = false
label.text = "jashfklhaslkfhaslkjdhflksadhflkasdhlkasdhflkadshkfdsjh"
return label
}()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(testView)
testView.centerXAnchor.constraintEqualToAnchor(view.centerXAnchor).active = true
testView.centerYAnchor.constraintEqualToAnchor(view.centerYAnchor).active = true
testView.widthAnchor.constraintEqualToConstant(100).active = true
testView.addSubview(testLabel)
testLabel.topAnchor.constraintEqualToAnchor(testView.topAnchor, constant: 10).active = true
testLabel.leftAnchor.constraintEqualToAnchor(testView.leftAnchor, constant: 10).active = true
testLabel.bottomAnchor.constraintEqualToAnchor(testView.bottomAnchor, constant: -10).active = true
testLabel.rightAnchor.constraintEqualToAnchor(testView.rightAnchor, constant: -10).active = true
}
答案 2 :(得分:1)
以下代码将解决您的问题:
//调整视图高度
[yourView setFrame:CGRectMake(yourView.frame.origin.x, yourView.frame.origin.y, yourView.frame.size.width, yourLable.frame.size.height + yourLable.frame.origin.y + extraspace)];
答案 3 :(得分:1)
首先使用此函数
计算标签的大小及其包含的文本func calculateSizeOfLabel(text:String,labelWidth:CGFloat,labelFont:UIFont)->CGSize{
let constrainedSize = CGSizeMake(labelWidth , 9999)
var attributesDictionary:[String:AnyObject] = [:]
attributesDictionary = [NSFontAttributeName:labelFont] as [String:AnyObject]
let string:NSMutableAttributedString = NSMutableAttributedString(string:text, attributes:attributesDictionary)
var boundingRect = string.boundingRectWithSize(constrainedSize, options:.UsesLineFragmentOrigin, context:nil)
if (boundingRect.size.width > labelWidth) {
boundingRect = CGRectMake(0,0, labelWidth, boundingRect.size.height);
}
return boundingRect.size
}
然后将返回大小的高度应用于UIView,如下所示
let labelText = description.text
let labelWidth = description.bounds.width
let labelFont = description.font
let calculatedHeight = calculateSizeOfLabel(labelText,labelWidth:labelWidth,labelFont:labelFont).height
DescView.frame = CGRectMake(DescView.frame.origin.x, DescView.frame.origin.y, DescView.bounds.width,calculatedHeight)
答案 4 :(得分:1)
我知道这是个迟来的答案,但可能会对其他人有所帮助。
要使UIView的动态高度遵循情节提要中的简单步骤
此技术可与该UIView中的其他视图一起使用。问题是您必须为该UIView中存在的视图指定底部约束。
答案 5 :(得分:0)
- (IBAction)action:(id)sender {
self.label.text = @"UIImage *imageOne = [UIImage imageNamed:@RosePot.jpUIImageJPEGRepresentationg";
NSLog(@"%f",self.label.bounds.size.height);
float height = [self getHeightForText:@"UIImage *imageOne = [UIImage imageNamed:@RosePot.jpUIImageJPEGRepresentationg" withFont:[UIFont fontWithName:@"HelveticaNeue" size:15] andWidth:self.label.bounds.size.width];
NSLog(@"%f",height);
self.constraint.constant = height + self.viewOne.bounds.size.height;
}
-(float) getHeightForText:(NSString*) text withFont:(UIFont*) font andWidth:(float) width{
CGSize constraint = CGSizeMake(width , 20000.0f);
CGSize title_size;
float totalHeight;
SEL selector = @selector(boundingRectWithSize:options:attributes:context:);
if ([text respondsToSelector:selector]) {
title_size = [text boundingRectWithSize:constraint
options:NSStringDrawingUsesLineFragmentOrigin
attributes:@{ NSFontAttributeName : font }
context:nil].size;
totalHeight = ceil(title_size.height);
} else {
title_size = [text sizeWithFont:font
constrainedToSize:constraint
lineBreakMode:NSLineBreakByWordWrapping];
totalHeight = title_size.height ;
}
CGFloat height = MAX(totalHeight, 40.0f);
return height;
}
为视图提供前导,上限,尾随和高度约束。
视图名称的高度出口作为约束[因为我使用了出口名称约束]