自定义方法的自定义完成块

1-定义你自己的自定义块

typedef void(^myCustomCompletion)(BOOL);

2-创建自定义方法,将自定义完成块作为参数

-(void) customMethodName:(myCustomCompletion) compblock{
    //do stuff
    // check if completion block exist; if we do not check it will throw an exception
    if(complblock)
       compblock(YES);
  }

3-如何在 Method 中使用块

[self customMethodName:^(BOOL finished) {
if(finished){
    NSLog(@"success");
}
}];