Question

I am writing an iOS app and I have one question to make the reading easier.

For example, I have many things to hide so I do this like this :
mytext1.hidden=YES;
mytext2.hidden=YES;
mytext3.hidden=YES;
…

Is there any way to write this :
(mytext1, mytext2, mytext3).hidden =YES;

?

Thanks

Answer 1

You can iterate an array with a selector like this:

[theArray makeObjectsPerformSelector:@selector(methodName)];

…and there’s a variation that takes a single object parameter. This won’t handle scalar types, though, so to set hidden=YES, you can enumerate using a block:

[theArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    (UITextField *)obj.hidden = YES;
}];

If that’s too verbose for your taste, you can add methods to the array class that assume, say, a collection of controls. These would just conceal the enumeration, but the caller could be as simple as this:

[myArrayOfControls hidden:YES];

Easy on the eyes, right? You can achieve this by creating your own custom category of NSArray methods:

// in Array+UIControlEnumeration.m

@implementation NSArray (UIControlEnumeration)

- (void)hidden:(BOOL)hidden {

    for (UIControl *control in self) {
        control.hidden = hidden;
    }
}