Re: unapprehended about block in code
Re: unapprehended about block in code
- Subject: Re: unapprehended about block in code
- From: User Mac <email@hidden>
- Date: Fri, 08 Aug 2014 16:24:36 +0800
yeah,I understand the reason of code.
Thanks very much!
bigpig
在 2014年8月8日，15:58，Viacheslav Karamov <email@hidden> 写道：
> "completion" is a block with return type void which has a parameter of type BOOL.
> A user could pass nil instead of block, so we need to check if block is supplied before invoke it.
>
> 08.08.14 10:45, User Mac wrote:
>> - (void)dismissAnimated:(BOOL)animated completion:(void(^)(BOOL finished))completion
>> {
>> void(^completionBlock)(BOOL) = ^(BOOL finished){
>> [self somefunction];
>>
>> if(completion)
>> {
>> completion(finished);
>> }
>> };
>> …………
>> ………...
>> }
>>
>>
>> I want to know what type of “completion",is it boolean or block? Why use “if” to judge “completion"? And what is the result of code”completion(finished)”.
>> _______________________________________________
>>
>
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