Objective-C:如何将字符串格式化为$ Price

#import<Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        double price = 123.45;
        NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
        [formatter setNumberStyle:NSNumberFormatterCurrencyStyle];
        [formatter setCurrencyCode:@"USD"];
        [formatter setCurrencySymbol:@"$"];
        NSString *formattedPrice = [formatter stringFromNumber:@(price)];
        NSLog(@"Formatted price: %@", formattedPrice);
    }
    return 0;
}