OC将基本数据类型和结构体包装成类NSValue/NSNumber

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{
    @autoreleasepool {
        typedef struct {
            int year;
            int month;
            int day;
        } Date;

        Date d = {, , };

        // 将结构体d包装成NSValue对象
        NSValue *dValue = [NSValue valueWithBytes:&d objCType:@encode(Date)];

        NSArray *array = @[dValue];


        // 取出value之前包装的结构体数据
        Date newD;
        [dValue getValue:&newD];
    }
    return ;
}

void useValue()
{
    CGPoint p1 = CGPointMake(, );
    CGPoint p2 = CGPointMake(, );

    NSArray *array = @[
                       [NSValue valueWithPoint:p1],
                       [NSValue valueWithPoint:p2]];

    //        NSValue *v2 = [array lastObject];
    //        v2.pointValue
}

void useNumber()
{
    // 基本数据类型
    int age = ;
    double height = ;
    BOOL rich = YES;

    // 将基本数据类型包装成NSNumber对象
    //        NSNumber *ageNum = [NSNumber numberWithInt:age];
    //        NSNumber *heightNum = [NSNumber numberWithDouble:height];
    //        NSNumber *richNum = [NSNumber numberWithBool:rich];

    //        NSArray *array = @[ageNum, heightNum, richNum];

    NSArray *array = @[ @(age), @(height), @(rich), @(), @];


    NSNumber *richNum = [array lastObject];

    // 取出之前的包装的数值
    NSLog(@"%d", richNum.boolValue);
}