Objective-C: `continue` in collection enumeration block?
A block is a lot like an anonymous function. So you can use
return
to exit from the function with return type void.
Use "continue" when using Fast Enumeration to do this.
Sample code:
NSArray *myStuff = [[NSArray alloc]initWithObjects:@"A", @"B",@"Puppies", @"C", @"D", nil];for (NSString *myThing in myStuff) { if ([myThing isEqualToString:@"Puppies"]) { continue; } NSLog(@"%@",myThing);}and output:
2015-05-14 12:19:10.422 test[6083:207] A2015-05-14 12:19:10.423 test[6083:207] B2015-05-14 12:19:10.423 test[6083:207] C2015-05-14 12:19:10.424 test[6083:207] DNot a puppy in sight.
You can not use continue in block, you will get error: continue statement not within a loop. use return;
[array enumerateObjectsUsingBlock: ^(id obj, NSUInteger idx, BOOL *stop) { /* Do something with |obj|. */ if (idx==1) { return; } NSLog(@"%@",obj); }];