Block的嵌套

有人喜欢协议,有人喜欢Block,但是根据需求要嵌套Block,即Block里面有Block.我百度了好想没有我想要的答案,然后灵光一闪蒙对了.

在ViewController.m中

- (void)viewDidLoad {
    [super viewDidLoad];
 
    //嵌套Block
    [self nestBlockWithBlock:^{
        NSLog(@"你好");
    }];
}

typedef void (^ BlockClass)(int);
-(void)nestBlockWithBlock:(void(^)())block{
    BlockClass blockClass = ^(int a){
        NSLog(@"%d",a);
        block();
    };
    blockClass(100);
}