1.CaculatorMaker
@interface CaculatorMaker : NSObject
@property(nonatomic,assign)int result;
-(CaculatorMaker *(^)(int))add;
-(CaculatorMaker *(^)(int))sub;
-(CaculatorMaker *(^)(int))muilt;
-(CaculatorMaker *(^)(int))divide;
@end
#import "CaculatorMaker.h" @implementation CaculatorMaker - (CaculatorMaker *(^)(int))add
{
return ^(int value)
{
self.result += value;
return self;
}; }
-(CaculatorMaker *(^)(int))sub{
return ^CaculatorMaker *(int value){
_result -= value;
return self;
}; }
-(CaculatorMaker *(^)(int))muilt;
{
return ^CaculatorMaker *(int value){
_result *= value;
return self;
};
}
-(CaculatorMaker *(^)(int))divide;
{
return ^CaculatorMaker *(int value){
_result /= value;
return self;
};
}
@end
NSObject (CaculatorMaker)
#import <Foundation/Foundation.h>
#import "CaculatorMaker.h"
@interface NSObject (CaculatorMaker)
//计算
+ (int)makeCaculators:(void(^)(CaculatorMaker *make))caculatorMaker; @end
#import "NSObject+CaculatorMaker.h" @implementation NSObject (CaculatorMaker)
//计算
+ (int)makeCaculators:(void(^)(CaculatorMaker *make))block
{
CaculatorMaker *mgr = [[CaculatorMaker alloc] init];
block(mgr);
return mgr.result;
}
@end
使用：
int iResult = [NSObject makeCaculators:^(CaculatorMaker *make) {
make.add(1).add(2).add(3).divide(2);
}];
NSLog(@"-==========:%d",iResult);