People

main.m

#import <Foundation/Foundation.h>
#import "People.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        // insert code here...
        //使用block实现链式编程
        People *p=  [[People alloc]init];
//        p.run() <=> [p run]();
        p.run().study();        
        p.run().name(@"将block和method的特性 结合起来");        
    }
    return 0;
}

People.m

@interface People : NSObject
- (People *(^)())run;
- (People *(^)())study;
- (People *(^)(NSString* name))name;
@end
@implementation People
- (People *(^)())run{
    return ^{
        NSLog(@"run");
        return self;
    };// 返回一个block
}
- (People *(^)())study{
    return ^{
        NSLog(@"study");
        return self;
    };// 返回一个block
}
- (People *(^)(NSString *))name{
    return ^(NSString *name){
        NSLog(@"%@",name);
        return self;
    };
}
@end