CODEWITHSUNDEEP
iosobjective-c
Amogh Talpallikar
Amogh Talpallikar

Reputation: 12184

Highlighted state for UIButton doesn't come when going from selected to normal state

I have a UIButton , with 4 different states according to my app.

state-1 normal.
state-2 selected.
state-3 highlighted , going normal-to-selected.
state-4 highlighted , going selected-to-normal.

Initially button is in normal state, and when I press it it goes to selected state and keep toggling between these states.

this is achieved by specifying images for the two states and changing the selected property.

However, on change of every state I needed to change the highlighted state image to make sure it represents either of state 3 and state 4 while being pressed.

The problem is , while coming from selected to normal, it looks like there is not highlighted state for UIButton.

So for now I keep a BOOL ivar to check the selection state in my View. and keep the button in normal state and change its image for highlighted state and normal state with every action based on value of the BOOL ivar.

Is there any simpler way to achieve this ?

Upvotes: 1

Views: 1624

Answers (2)

Marcus Adams
Marcus Adams

Reputation: 53880

Saving the highlighted state in a Boolean variable is a common way to keep track of the state, however here's something that will simply your code.

There is a setHighlighted method that gets called on the UIControl that you can override. You can set your variable in there instead of in multiple actions:

-(void)setHighligted:(BOOL) highlighted {
    self.mySavedHighlightedState = highlighted;
}

Create a custom UIButton class with a mySavedHighlightedState property to implement this.

Upvotes: 0

hfossli
hfossli

Reputation: 22982

The reason for this is that the state is a mix of two values.

Some of the most commons ones

UIControlStateNormal,
UIControlStateHighlighted,
UIControlStateDisabled,
UIControlStateSelected,
UIControlStateSelected | UIControlStateHighlighted,
UIControlStateSelected | UIControlStateDisabled,

So if you want to have a highlighted state when selected then I prefer to do like this.

    [button setImage:imageHighlighted forState:UIControlStateSelected | UIControlStateHighlighted];

If a general rule is that you always have same highlighted state when selected you can do something along the lines of

    UIControlState mixedState = UIControlStateSelected | UIControlStateHighlighted;
    [button setImage:[button imageForState:state] forState:state];
    [button setBackgroundImage:[button backgroundImageForState:state] forState:state];
    [button setTitleColor:[button titleColorForState:state] forState:state];

And so on

Upvotes: 8

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