object c NSNumber

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//创建NSNumber类型的对象

NSNumber*intNumber=[[NSNumber alloc]initWithInt:100];

NSNumber*intNumber2=[NSNumber alloc]initWithInt:102];

NSNumber*floatNumber=[NSNumber alloc]initWithfloat:100.00f];

NSNumber*doubleNumber=[[NSNumber alloc]initWithdouble:100.0];
NSNumber*charNumber=[[NSNumber alloc]initWithchar:'A'];

//判断两个对象是否相等.0是NO 1是YES

BOOL ret=[intNumber isEqualToNumber:intNumber2];

NSLog(@"%d",ret);

//比较两个对象的大小

if([intNumber compare:intNumber2]==NSOrderedAscending){

NSLog(@"intNumber<intNumber2");

}else if([intNumber compare:intNumber2]==NSOrderedSame){

NSLog(@"intNumber==intNumber2");

}else if([intNumber compare:intNumber2]==NSOrderedDescending){

NSLog(@"intNumber>intNumber2");

}

//打印对象

NSLog(@"%@",intNumber);

NSLog(@"%@",intNumber2);

NSLog(@"%@",floatNumber);

NSLog(@"%@",doubleNumber);

NSLog(@"%@",charNumber);

// NSNumber对象，不支持自动解包(也就是不会自动转化为int,flolat,double类型)

NSLog(@"%d",[intNumber intValue]);

NSLog(@"%d",[intNumber2 intValue]);

NSLog(@"%f",[flaotNumber floatValue]);

NSLog(@"%f",[doubleNumber doubleValue]);

NSLog(@"%c",[charNumber charValue]);

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