Question

我正在开发一个应用程序，我希望将一个数字（例如1,000,000）格式化为短字符串。

一些例子是：

1000 => "1k"
50000 => "50k"
83952 => "84k"
1000000 => "1m"
1000000000 => "1b"

我认为最好的方法是使用NSNumberFormatter或者只是将其四舍五入然后计算＆＃34; 0＆＃34;的数量。任何人都有以这种方式使用NSNumberFormatter的示例或任何资源来开始。

Answer 1

您需要子类化NSNumberFormatter：

示例：

@implementation LTNumberFormatter

@synthesize abbreviationForThousands;
@synthesize abbreviationForMillions;
@synthesize abbreviationForBillions;

-(NSString*)stringFromNumber:(NSNumber*)number
{
if ( ! ( abbreviationForThousands || abbreviationForMillions || abbreviationForBillions ) )
{
    return [super stringFromNumber:number];
}

double d = [number doubleValue];
if ( abbreviationForBillions && d > 1000000000 )
{
    return [NSString stringWithFormat:@"%@ %@", [super stringFromNumber:[NSNumber numberWithDouble:d / 1000000000]], abbreviationForBillions];
}
if ( abbreviationForMillions && d > 1000000 )
{
    return [NSString stringWithFormat:@"%@ %@", [super stringFromNumber:[NSNumber numberWithDouble:d / 1000000]], abbreviationForMillions];
}
if ( abbreviationForThousands && d > 1000 )
{
    return [NSString stringWithFormat:@"%@ %@", [super stringFromNumber:[NSNumber numberWithDouble:d / 1000]], abbreviationForThousands];
}
    return [super stringFromNumber:number];
}

@end

将NSNumber格式化为__ k / M / B.

1 个答案: