如何在UIlabel中将上标％字符显示为字符串？

Question

如何在UIlabel中将上标％字符显示为字符串？我知道％unicode中不存在％作为上标，但有没有办法可以将％显示为上标而不是使用html标签？

Answer 1

我在Stackoverflow上使用属性字符串

在上标样式文本上发现了这篇文章

NSAttributedString superscript styling

所以使用它，我破解了这个演示：

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    UIFont *font = [UIFont fontWithName:@"Helvetica" size:20];

    UILabel *textBlock1 = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height / 2.0)];
    textBlock1.backgroundColor = [UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:1.0];
    textBlock1.textAlignment = NSTextAlignmentCenter;
    textBlock1.font = font;

    textBlock1.text = @"57%";





    UILabel *textBlock2 = [[UILabel alloc] initWithFrame:CGRectMake(0, self.view.bounds.size.height / 2.0, self.view.bounds.size.width, self.view.bounds.size.height / 2.0)];
    textBlock2.backgroundColor = [UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:1.0];
    textBlock2.textAlignment = NSTextAlignmentCenter;

    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"57%"
                                                                                         attributes:@{NSFontAttributeName: font}];
    [attributedString setAttributes:@{NSFontAttributeName : [UIFont fontWithName:@"Helvetica" size:10]
                                      , NSBaselineOffsetAttributeName : @10} range:NSMakeRange(2, 1)];

    textBlock2.attributedText = attributedString;



    [self.view addSubview:textBlock1];
    [self.view addSubview:textBlock2];
}

结果：

Answer 2

对于简单易用的Swift解决方案，您可能需要结帐 HandyUIKit 。将其导入项目后（例如通过Carthage - 参见README中的说明），您可以执行以下操作：

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let userLocation:CLLocation = locations[0] as CLLocation
    // Call stopUpdatingLocation() to stop listening for location updates,
    // other wise this function will be called every time when user location changes.

    //  manager.stopUpdatingLocation()
    print("user latitude = \(userLocation.coordinate.latitude)")
    print("user longitude = \(userLocation.coordinate.longitude)")

    let geoCoder = CLGeocoder()
    let location = CLLocation(latitude: userLocation.coordinate.latitude, longitude: userLocation.coordinate.longitude)
    //location.accessibilityLanguage = "en-US"
    UserDefaults.standard.set(["base"], forKey: "AppleLanguages")
    geoCoder.reverseGeocodeLocation(location, completionHandler: { placemarks, error in
        guard let addressDict = placemarks?[0].addressDictionary else {
            return
        }
        print(addressDict)
        // Print each key-value pair in a new row
        addressDict.forEach { print($0) }

        // Print fully formatted address
        if let formattedAddress = addressDict["FormattedAddressLines"] as? [String] {
            print(formattedAddress.joined(separator: ", "))
        }

        // Access each element manually
        if let locationName = addressDict["Name"] as? String {
            print(locationName)
        }
        if let street = addressDict["Thoroughfare"] as? String {
            print(street)
        }
        var myCity:String = ""
        if let city = addressDict["City"] as? String {
            print(city)
            if(city != "" ){
                myCity = city
            }
        }
        if let zip = addressDict["ZIP"] as? String {
            print(zip)
        }
        var myCountry:String = ""
        if let country = addressDict["Country"] as? String {
            print(country)
            if(country != "" ){
                myCountry = country
            }
            MyGenericFunctions.sharedInstance.saveCountry(country: country)
        }
        manager.stopUpdatingLocation()

        if(myCity != "" && myCountry != "" && self.isCurrLocAPICalled != true){
           print("API Called")
            self.isCurrLocAPICalled = true
            self.callLocationSearch(strCity: myCity, strCountry: myCountry)
            UserDefaults.standard.removeObject(forKey: "AppleLanguages")
        }

    })

    //manager.stopUpdatingLocation()
}

此行将返回import HandyUIKit "57^{%}".superscripted(font: UIFont.systemFont(ofSize: 20, weight: .medium)) ，其外观与您要查找的内容完全相同。只需将其分配给NSAttributedString UILabel 属性，然后即可！

如果您正在寻找下标文字，请改用attributedText。它将识别subscripted(font:)之类的结构。如果你想组合两者，还有CO_{2}。

有关更多信息和其他示例，请参阅docs。