Objective-C:NSNumber类的常见用法

NSNumber基本数据类型包装类：

//

//  main.m

//  04-NSNumber

//

//  Created by ma c on 15/8/17.

//  Copyright (c) 2015年. All rights reserved.

//

#import <Foundation/Foundation.h>

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

{

@autoreleasepool

{

//NSNumber的测试(基本数据包装类)

NSNumber *number1 = @10;

NSNumber *number2 = @12.34;

NSNumber *number3 = [NSNumber numberWithChar:'A'];

NSNumber *number4 = [NSNumber numberWithBool:NO];

char c = [number3 charValue];

int ci = [number3 intValue];

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

NSLog(@"ci = %d",ci);

BOOL b = [number4 boolValue];

NSLog(@"b = %d",b);

double d = [number2 doubleValue];

NSLog(@"d = %lf",d);

int i = [number2 intValue];

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

}

return 0;

}