Objective-c语言_基本数据类型封装和拆包

#import <Foundation/Foundation.h>

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

@autoreleasepool {

/*

OC中封装、拆包基本数据类型

Foundation框架下的基础类

NSValue / NSNumber

功能:将OC和C
当中的基本数据类型转换成实例对象，即将'值类型'转换成'引用类型'

*/

//OC中常用的数据类型

int a = 5;

float b =
5.0;

double c =
5.5 ;

char d = 'a';

bool flag =
YES;

// CGPoint point = {3,4};

// CGSize size = {5,6};

// CGRect rect = {point,size};

//NSRange包含了两个成员，location
以及 length。location表示起始位置，以0开始;length表示长度

// NSRange range = {10,3};

CGPoint point =
CGPointMake(3,
4);

CGSize size =
CGSizeMake(5,
6);

CGRect rect =
CGRectMake(3,
4, 5, 6);

NSRange range =
NSMakeRange(10,
3);

NSEdgeInsets edgeInsets =
NSEdgeInsetsMake(10,
10, 10, 10);

//NSValue
以及 NSNumber

//NSValue
为 NSNumber的父类

//其中NSValue
可以将CGPoint,CGSize,CGRect,NSRange,NSEdgeInsets转换成对象

NSValue *pointVa = [NSValue
valueWithPoint:point];

NSValue *sizeVa = [NSValue
valueWithSize:size];

NSValue *rectVa = [NSValue
valueWithRect:rect];

NSValue *rangeVa = [NSValue
valueWithRange:range];

NSValue *edgeInsetsVa = [NSValue
valueWithEdgeInsets:edgeInsets];

//其中NSNumber
可以将'int','float','double','char','bool'等C中基本数据类型转换成对象

NSNumber *intNumber = [NSNumber
numberWithInt:a];

NSNumber *floatNumber = [NSNumber
numberWithFloat:b];

NSNumber *doubleNumber = [NSNumber
numberWithDouble:c];

NSNumber *charNumber = [NSNumber
numberWithChar:d];

NSNumber *boolNumber = [NSNumber
numberWithBool:flag];

//我们将C和OC中的基本数据类型(值类型)转换成对象(引用类型)的过程，叫做封装。相对应的也有一个将对象转变成基本数据类型，此过程叫做拆包。

//拆包

int a1 = [intNumber
intValue];

float b1 = [floatNumber
floatValue];

double c1 = [doubleNumber
doubleValue];

char d1 = [charNumber
charValue];

bool flag1 =[boolNumber
boolValue];

CGPoint point1 = [pointVa
pointValue];

CGSize size1 = [sizeVa
sizeValue];

CGRect rect1 = [rectVa
rectValue];

NSRange range1 = [rangeVa
rangeValue];

NSEdgeInsets edgeInsets1 = [edgeInsetsVa
edgeInsetsValue];

}

return 0;

}