4 method that takes a number of rows in the main thread

1-gcdblockblock

Dispatch_async (Dispatch_get_main_queue (), ^{

});

2-nsoperation

Nsoperationqueue *mainqueue = [Nsoperationqueue

Mainqueue];

Nsblockoperation *operation = [nsblockoperation

blockoperationwithblock:^{

}];

[Mainqueue addoperation:operation];

3-nsthread

[Selfperformselector: @selector (method)

Onthread:[nsthread Mainthread] WithObject:nilwaitUntilDone:YESmodes:nil];

[Selfperformselectoronmainthread: @selector (method)

WithObject:nilwaitUntilDone:YES];

[[Nsthread Mainthread] Performselector:

@selector (method) Withobject:nil];

4-runloop

[Selfperformselectoronmainthread: @selector (method)

WithObject:nilwaitUntilDone:YES];

[[Nsthread Mainthread] Performselector:

@selector (method) Withobject:nil];

? Runloop

[[Nsrunloop Mainrunloop] Performselector: @selector (method) Withobject:nil];

4 method that takes a number of rows in the main thread