lf644206005的专栏

先上代码:int main(){ int dmy = 256; int val = 10; const char *fmt = "val = %d\n"; void (^blk)(void) = ^{print(fmt, val)}; val = 2; fmt = "These values were changed. val = %d\n";

先上两段代码：//1int val = 0;void (^blk)(void) = ^{val = 1};//2id array = [[NSMutableArray alloc] init];void (^blk)(void) = ^{ id obj = [[NSObject alloc] init]; [array addobject:obj];};稍微用过block的