IOS之构造方法与自定义构造方法的区别与实现

#import <Foundation/Foundation.h> #import "Iphone.h" int main(int argc, const charchar * argv[]) {  /*  Iphone * phone1 = [Iphone new];  phone1->_cpu = 1.5;  phone1->_ram = 512;  */  /*Iphone * phone = [Iphone alloc];//offcc  phone = [phone init];//[0ffcc init];  */  //开辟内存空间，以及初始化成员变量合并一起调用  Iphone * phone = [[Iphone alloc]init];//[0ffcc init];  phone->_ram = 512;   NSLog(@"%@",phone);   Iphone * phone2 = [[Iphone alloc] initWithIphoneSize:IphoneSize4point0];   NSLog(@"%@",phone2);   Iphone * phone3 = [[Iphone alloc] initWithIphoneSize:IphoneSize4point0 andPhoneColor:IphoneColorBlack];  return 0; } 

#import <Foundation/Foundation.h>  enum IphoneSize {  IphoneSize3point5,//3.5寸屏幕  IphoneSize4point0,//4.0寸屏幕  IphoneSize4point7,//4.7寸屏幕  IphoneSize5point5 //5.5寸屏幕 };  typedef enum IphoneSize IphoneSize; enum IphoneColor {  IphoneColorWhite,  IphoneColorBlack };  typedef enum IphoneColor IphoneColor;   enum IphoneFlashLightStatus {  IphoneFlashLightStatusOpen,  IphoneFlashLightStatusClose,  IphoneFlashLightStatusAuto }; typedef enum IphoneFlashLightStatus IphoneFlashLightStatus;   @interface Iphone : NSObject {  @public  /** 用来存储iPhone屏幕尺寸 */  //enum IphoneSize 与IphoneSize 等价  IphoneSize _size;//用来存储iPhone屏幕尺寸  /** 用来存储iPhone颜色 */  IphoneColor _color;//用来存储iPhone颜色   /** 用来存储cpu大小 */  float _cpu;  /** 用来存储内部容量大小 */  float _ram; }   /**打开闪光灯*/ -(void)openFlashLight; /**关闭闪光灯*/ -(void)closeFlashLight; /**自动*/ -(void)flaseLightAuto; /**拍照*/ -(void) cameraWithFlashLightStatus:(IphoneFlashLightStatus)flaseLightStatus;  /**根据传入参数返回相应颜色*/ -(NSString * )getColorWithIphoneColor:(IphoneColor)iphoneColor;   +(NSString *)getColorWithIphoneColor:(IphoneColor)iphoneColor;  //自定义构造方法 //1.一定是对象方法 //2.构造方法一定是init开头 -(Iphone *)initWithIphoneSize:(IphoneSize)iphoneSize; -(Iphone *)initWithIphoneSize:(IphoneSize)iphoneSize andPhoneColor:(IphoneColor)iphoneColor; @end