［好程序员训练营］Objective－C学习笔记－－－基本数据结构NSNumber

 1     NSNumber *intnumber = [[NSNumber alloc] initWithInt:1];
 2    //将int型整数1变为对象    
 3     NSNumber *intnumber1 = [[NSNumber alloc] initWithInt:1];
 4 
 5     //将Number *floatnumber = [NSNumber  numberWithFloat:4.555f];
 6       //将浮点数4.555变为对象
 7     NSNumber *doublenumber = [[NSNumber alloc] initWithDouble:4.123456];
 8    //将双精度浮点书4.123456变为对象
 9     NSNumber *charnumber = [[NSNumber alloc] initWithChar:@"L"];
10    //将字符型“L”变为对象
11     
12     //以上所有方法均可以下面的方法代替，以整型为例
13     NSNumber intnumber1 ＝ ［NSNumber numberWithInt：1］;
14 
15     Boolean a = [intnumber isEqualToNumber:floatnumber];// 判断两个整数是否相等
16     
17    //判断两个整数的大小
18    if ([intnumber1 compare:intnumber]==NSOrderedSame) {
19         NSLog(@"=");
20     }
21    elseif（[intnumber1 compare:intnumber]==NSOrderedAscending）｛
22        NSLo g（@“<”）; 
23    ｝
24     else{
25       NSLog(@">");
26    }