Question

When i press button it changes image into green but it quit dark,but its original color like lookup button image,so what’s wrong in my code?

- (void)viewDidLoad {
    [super viewDidLoad];
    UIImage *clear_img = [UIImage imageNamed:@"0.png"];
    UIImage *clear_hover_img = [UIImage imageNamed:@"0_hover.png"];
    clear=[[UIButton alloc]init];
    [clear setTitle:@"Clear" forState:UIControlStateNormal];
    //clear.tag =12;
    clear.titleLabel.font = [UIFont fontWithName:@"Helvetica-Bold" size:32];

    if(clear.selected=TRUE){
        [clear setBackgroundImage:clear_img forState:UIControlStateSelected];
        [clear setBackgroundImage:clear_hover_img forState:UIControlStateNormal];
    }

    [clear setFrame:CGRectMake(1, 360, 159, 50)];
    [clear addTarget:self action:@selector(clearInput)
    forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:clear];
}

-(void)clearInput {

    textfield.text = @"";
    UIImage *lookup_img = [UIImage imageNamed:@"0_.png"];
    [lookup setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
    [lookup setBackgroundImage:lookup_img forState:UIControlStateNormal];
}

Answer 1

For state TouchUpInside, Button Image Opacity decrease to 0.5.
try this-

if(clear.selected == TRUE){
    [clear setBackgroundImage:clear_img forState:UIControlStateSelected];
    [clear setBackgroundImage:clear_hover_img forState:UIControlStateNormal];
    [clear setBackgroundImage:clear_hover_img UIControlStateHighlighted];
}