定义方法：

#import 
     
      @interface Model : NSObject@property (strong,nonatomic)  NSString *name;@property (strong,nonatomic)  NSString *age;+(Model*)initWithName:(NSString*)name AndAge:(NSString*)age;@end
     

#import "Model.h"@implementation Model+(Model*)initWithName:(NSString *)name AndAge:(NSString *)age{        static Model *model=nil;        if (model==nil) {        model=[[Model alloc]init];        model.name=name;        model.age=age;    }    return model;}@end

 

 

调用的时候：

在一个类中： Model *model =[Model initWithName:@"testName1" AndAge:@"1"];

在另一个类中：Model *model =[Model initWithName:@"testName2" AndAge:@"2"];

 

结果：   testName1     1