doubleValue

INDEX>Foundation>NSDecimalNumber

十進数オブジェクトの近似値のdouble数値

Objective-C

@property(readonly) double doubleValue

Swift

var doubleValue: Double { get }

double数値

解説

十進数オブジェクトの近似値のdouble数値。

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] autorelease];
NSDecimalNumber *dNum1 = [[[NSDecimalNumber alloc] initWithString:@"3000"] autorelease];
NSDecimalNumber *dNum = [NSDecimalNumber alloc];

dNum = [NSDecimalNumber decimalNumberWithDecimal:[dNum1 decimalValue]];

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

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

@end

Swift

    //NSDecimalNumber doubleValue
    @IBAction func function023(sender: AnyObject) {
        //カスタムの丸め挙動　小数点第二位でRoundPlain
        let behavior : NSDecimalNumberHandler = NSDecimalNumberHandler(roundingMode: NSRoundingMode.RoundPlain, scale: 2, raiseOnExactness: false, raiseOnOverflow: false, raiseOnUnderflow: false, raiseOnDivideByZero: false)
        
        let dNum1 : NSDecimalNumber =
        NSDecimalNumber(string: "3.141592")
        let dNum : NSDecimalNumber = dNum1.decimalNumberByRoundingAccordingToBehavior(behavior)
        let numFormat : NSNumberFormatter = NSNumberFormatter()
        numFormat.minimum = dNum    //最小値が3.14000
        numFormat.positiveFormat = "#,##0.000000"
        textField.formatter = numFormat
        NSLog("%f",dNum.doubleValue)
        commentLabel.stringValue = "←最小値が3.14000"
    }

編集時のバージョン

OS X 10.11
Swift2.0