小编Gee*_*k20的帖子

如何使用Swift(macOS)获取相应货币代码的货币符号.

例:

• EUR =€1.00
• 美元= 1.00美元
• CAD = $ 1.00
• GBP =£1.00

我的代码:

var formatter = NSNumberFormatter()
formatter.currencySymbol = getSymbol(currencyCode)
formatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle
let number = NSNumber(double: (amount as NSString).doubleValue)
let amountWithSymbol = formatter.stringFromNumber(number)!

getSymbol(_ currencyCode: String) -> String

或者,还有更好的方法？

我如何在 Swift 中使用下面的 Objective-C 代码，我试过了，但出了点问题。

目标-C：

NSUInteger index = [theArray indexOfObjectPassingTest:
            ^BOOL(NSDictionary *dict, NSUInteger idx, BOOL *stop)
            {
                return [[dict objectForKey:@"name"] isEqual:theValue];
            }
    ];

斯威夫特（不起作用）：

let index = theArray.indexOfObjectPassingTest { (var dict: NSDictionary, var ind: Int, var bool: Bool) -> Bool in
                return dict.objectForKey("name")?.isEqual("theValue")
            }

我需要这样的东西：

但我的代码是这样做的：

func collectionView(collectionView: NSCollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> NSView {
    let a = myView()
    if kind == NSCollectionElementKindSectionHeader {
        a.frame = NSMakeRect(0, 0, 1000, 10)
    }
    else if kind == NSCollectionElementKindSectionFooter {
        a.frame = NSMakeRect(0, 0, 1000, 12)
    }
    return a
}

func numberOfSectionsInCollectionView(collectionView: NSCollectionView) -> Int {
    return 3
}

override func numberOfItemsInSection(section: Int) -> Int {
    if section == 0 {
        return 5
    }
    else if section == 1 {
        return 5
    }
    return …

如何在OS X中显示带圆角的NSVisualEffectView？

我添加NSVisualEffectView的代码:

let visualEffectView = NSVisualEffectView(frame: NSMakeRect(0, 0, 300, 300))
visualEffectView.material = NSVisualEffectMaterial.Dark
visualEffectView.blendingMode = NSVisualEffectBlendingMode.BehindWindow
self.addSubview(visualEffectView)

如何快速获取对应货币代码的 NSLocale？

编码：

func format(amount: String, code: String) -> NSDictionary {
        var formatter = NSNumberFormatter()
        let locale = getLocaleByCurrencyCode(code)
        formatter.locale = locale
        formatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle
        let number = NSNumber(double: (amount as NSString).doubleValue)
        return ["locale":locale, "amount": formatter.stringFromNumber(number)!]
    }


func getLocaleByCurrencyCode(code) -> NSLocale {
   ...
}