How to select all buttons when we select last button in ios - ios

Question

Iam new to IOS programming,i have one doubt explained below:
I have 10 buttons as stars in the view,
If i click 10th button i need to show all buttons as selected.
If i click 5th button i need to show 5 buttons as selected.
I need this functionality to give rating in my ios app.
Please can anyone suggest me the solution for my question.
Thanks in advance

Answer 1

If I have to do this then I will give this button row an incremented tag from 1 to 10, then if someone press the 5 button i will get its tag and using loop change the button images from 1 to 5 getting the object of button using tag.
like you have selector for all button
-(void)userRatingAction:(id)sender {
UIButton* button = (UIButton*)sender;
for(int index = 1; index <= button.tag; index++) {
UIButton* ratingButton = (UIButton*)[self.view viewWithTag:index];
// set the button image here
}
}

Answer 2

I think you can find your answer with the help of below link http://try.sencha.com/touch/2.2.0/demos/Ext.List.select/

Answer 3

Use of Tag property can solve the problem.
Assign tag to all the UIButtons you have starting from 1-10. Create a common IBAction and on action..
-(IBAction)btnAction:(id)sender{
UIButton *selectedBtn=(UIButton *)sender;
//First Reset all the selection
for(UIButton *btn in self.view.subviews){
if([btn isKindOfClass:[UIButton class]]){
if(btn.tag>=1 && btn.tag<=10){
btn.selected=NO;
}
}
}
//Now Select
for(UIButton *btn in self.view.subviews){
if([btn isKindOfClass:[UIButton class]]){
if(btn.tag>=1 && btn.tag<=selectedBtn.tag){
btn.selected=YES;
}
}
}
}
Thats it.
Cheers.

Answer 4

To draw star buttons -
make imgArr global nsmutable array to store button objects
imgArr = [[NSMutableArray alloc ]init];
float leftMargin = 10;
float topMargin = 50;
for (int i=0; i<10; i++) {
UIButton *starBtn = [[UIButton alloc]initWithFrame:CGRectMake(leftMargin, topMargin, 25, 25)];
[starBtn setBackgroundColor:[UIColor clearColor]];
[starBtn setImage:[UIImage imageNamed:#"star_empty.png"] forState:UIControlStateNormal];
[starBtn setTag:i+1];
[starBtn setTitle:[NSString stringWithFormat:#"%d",i] forState:UIControlStateNormal];
[starBtn addTarget:self action:#selector(starBtnClicked:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:starBtn];
[imgArr addObject:starBtn];
leftMargin += 35;
}
-(void)starBtnClicked:(UIButton *)tempBtn{
NSLog(#"TEMP BTN CLICKED :: %#",tempBtn.titleLabel.text);
for (int i=0; i<imgArr.count; i++) {
UIButton *btn = (UIButton *)[imgArr objectAtIndex:i];
if(i < tempBtn.tag){
[btn setImage:[UIImage imageNamed:#"star_full.png"] forState:UIControlStateNormal];
}else{
[btn setImage:[UIImage imageNamed:#"star_empty.png"] forState:UIControlStateNormal];
}
}
}

Answer 5

to do so follow these steps.
Step 1 - From xib set tag of all buttons sequentially in incremented order. (e.g. 101, 102, 103, 104, 105, 106, 107, 108, 109, 110)
Step 2 - Write following code in your .m file.
-(IBAction)rattingsButtonTapped:(id)sender {
int currentTag = [sender tag];
for (int index = 101; index <= 110; index++) {
if ([[self.view viewWithTag:index] isKindOfClass:[UIButton class]]) {
UIButton *button = (UIButton *)[self.view viewWithTag:index];
if (button.tag <= currentTag) {
button.selected = YES;
} else {
button.selected = NO;
}
}
}
}
Step 3 - set IBAction - UITouchupInside to above methods.
you are all set, Compile and check code.