OC：NSNumber （Foundation）

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// main.m

// Foundation框架1212

// Created by jerehedu on 14/12/12.

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])

{

@autoreleasepool {

// NSNumber:专门用来包装基础数据类型，把它存储为对象

NSNumber *intN1 = [[NSNumber alloc] initWithInt:1];

NSLog(@"intN1=%@",intN1);

NSNumber *intN2 = [[NSNumber alloc] initWithInt:1];

NSLog(@"intN2=%@",intN2);

//判断两个对象是否相等

// BOOL 类型 [intN1 isEqualToNumber:intN2]

NSLog(@"%hhd",[intN1 isEqualToNumber:intN2]);

//比较两个数字对象大小 isEqualToValue 比较相同数据类型

if ([intN1 isEqualToValue: intN2]) {

NSLog(@"相等");

}

else

NSLog(@"不相等");

//输出的对象是字符的Ascii码

NSNumber *charN = [[NSNumber alloc] initWithChar:'q'];

NSLog(@"charN=%@",charN);

//把对象转化为相对应的数据类型

char c = [charN charValue];

NSLog(@"%c",c);

NSNumber *floatW = [[NSNumber alloc] initWithFloat:3.14];

NSLog(@"floatW=%@",floatW);

NSNumber *doubleQ = [[NSNumber alloc] initWithDouble:1.000];

NSLog(@"doubleQ=%@",doubleQ);

NSNumber *string = [[NSNumber alloc] initWithBool:YES];

NSLog(@"string=%@",string);

BOOL b = [string boolValue];

NSLog(@"%hhd",b);

NSNumber *stringq = [[NSNumber alloc] initWithBool:NO];

NSLog(@"stringq=%@",stringq);

//比较两个数字对象的大小

//[intN2 compare:doubleQ] -1 0 1

if ([intN1 compare:intN2] == NSOrderedAscending) {

NSLog(@"比较两个数字对象的大小 %@ < %@",intN1,intN2);

}else if ([intN1 compare: intN2 ] == NSOrderedSame)

{

NSLog(@"比较两个数字对象的大小 %@ = %@",intN1,intN2);

}

else

{

NSLog(@"比较两个数字对象的大小 %@ > %@",intN1,intN2);

}

//NSLog(@"aaa%ld",[intN2 compare:doubleQ]);

NSNumber *charM1 = [[NSNumber alloc] initWithChar:'A'];

NSLog(@"charM1=%@",charM1);

NSNumber *charM2 = [[NSNumber alloc] initWithChar:'a'];

NSLog(@"charM2=%@",charM2);

char d = [charM1 charValue];

NSLog(@"%c",d);

if ( [charM1 compare:charM2] == NSOrderedAscending) {

NSLog(@"比较两个数字对象的大小 %@ < %@",charM1,charM2);

}else if ([charM1 compare:charM2] == NSOrderedSame)

{

NSLog(@"比较两个数字对象的大小 %@ = %@",charM1,charM2);

}

else

{

NSLog(@"比较两个数字对象的大小 %@ > %@",charM1,charM2);

}

if ( [intN1 compare:doubleQ] == NSOrderedAscending) {

NSLog(@"比较两个数字对象的大小 %@ < %@",intN1,doubleQ);

}else if ([intN1 compare:doubleQ] == NSOrderedSame)

{

NSLog(@"比较两个数字对象的大小 %@ = %@",intN1,doubleQ);

}

else

{

NSLog(@"比较两个数字对象的大小 %@ > %@",intN1,doubleQ);

}

// isEqualToValue

if ([intN1 isEqualToValue: doubleQ]) {

NSLog(@" isEqualToValue 相等");

}

else

NSLog(@"isEqualToValue 不相等");

// isEqualToNumber

if ([intN1 isEqualToNumber: doubleQ]) {

NSLog(@"isEqualToNumber 相等");

}

else

NSLog(@"isEqualToNumber 不相等");

}

return 0;

}

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