NSNumber的常用方法

int int1 =100;

float float1 =8.12;

NSNumber *number1 = [NSNumbernumberWithInt:int1];

NSNumber *number2 = [NSNumbernumberWithFloat:float1];

int int2 = [number1intValue];

float float2 = [number2floatValue];

NSLog(@"number1 : %@",number1);

NSLog(@"number2 : %@",number2);

NSLog(@"int2 : %d",int2);

NSLog(@"float2 : %.2f",float2);