decimalNumberByRaisingToPower:withBehavior:

INDEX>Foundation>NSDecimalNumber

累乗して丸めた十進数オブジェクトを返します

Objective-C

- (NSDecimalNumber *)decimalNumberByRaisingToPower:(NSUInteger)power
                                      withBehavior:(id<NSDecimalNumberBehaviors>)behavior

Swift

func decimalNumberByRaisingToPower(_ power: Int,
                      withBehavior behavior: NSDecimalNumberBehaviors?) -> NSDecimalNumber

解説

累乗して丸めた十進数オブジェクトを返します。
レシーバが3でpowerが3なら27を返します（3^3）

返り値

Objective-C

( NSDecimalNumber * )

Swift

NSDecimalNumber

十進数オブジェクト

引数

Objective-C

( unsigned )power

Swift

_ power: Int

累乗

Objective-C

( id <NSDecimalNumberBehaviors> )behavior

Swift

withBehavior behavior: NSDecimalNumberBehaviors?

丸め方法

フレームワーク

Foundation

クラス

NSDecimalNumber

使用可能

10.0

参照

例文

Objective-C

#import "MyObject.h"

@implementation MyObject

- (IBAction)myAction:(id)sender
{
NSNumberFormatter *numFormat = [[NSNumberFormatter alloc] init] ;
NSDecimalNumber *dNum1 = [[NSDecimalNumber alloc] initWithString:@"3"];
NSDecimalNumber *dNum = [NSDecimalNumber alloc];

dNum = [dNum1 decimalNumberByRaisingToPower:3 withBehavior:[NSDecimalNumber defaultBehavior]];

[numFormat setMaximum:dNum];
[numFormat setPositiveFormat:@"#,##0.00"];
[myOutlet setFormatter:numFormat];

NSLog([NSString stringWithFormat:@"%.2f",[[numFormat maximum] doubleValue]]);
}

@end

Swift

    //NSDecimalNumber decimalNumberByRaisingToPower:withBehavior:
    @IBAction func function020(sender: AnyObject) {
        let dNum1 : NSDecimalNumber =
        NSDecimalNumber(string: "2")
        let dNum2 : Int = 3
        let dNum : NSDecimalNumber = dNum1.decimalNumberByRaisingToPower(dNum2, withBehavior: NSDecimalNumber.defaultBehavior())
        let numFormat : NSNumberFormatter = NSNumberFormatter()
        numFormat.minimum = dNum    //最小値が2^3=8
        numFormat.positiveFormat = "#,##0.00"
        textField.formatter = numFormat
        NSLog("function013")
        commentLabel.stringValue = "←最小値が2^3=8"
    }

編集時のバージョン

OS X 10.11
Swift2.0