如何存储上次选择的按钮

debugcn 发表于 Dev

爱科技

我创建了一个测验应用程序。

有用于显示问题的标签和用于显示答案的四个按钮。

在单击下一步按钮时，问题和所有选项均已更改并从阵列中获取。

但是，在单击上一个按钮时，所有复选框均被清除。如何存储先前选择的按钮。

这是我的代码

    - (void)viewDidLoad
    {
        [super viewDidLoad];
        k = 0;
        ansCount = 0;
        NSLog(@"%d",ansCount);
        self.btnFinish.hidden = YES;
        self.btnPrevious.hidden = YES;
        // Do any additional setup after loading the view.
        arrAddQues = [[NSMutableArray alloc]init];
        arrAddOption1 = [[NSMutableArray alloc]init];
        arrAddOption2 = [[NSMutableArray alloc]init];
        arrAddOption3 = [[NSMutableArray alloc]init];
        arrAddOption4 = [[NSMutableArray alloc]init];
        arrAns = [[NSMutableArray alloc]init];

        Facilities *facility = [[Facilities alloc]init];

        NSMutableArray *arrayData = [facility selectData:[NSString stringWithFormat:@"select * from ios"]];
        for (int i = 0; i < arrayData.count ; i++) {
            NSLog(@"%@",[arrayData objectAtIndex:i]);
                }
        for(NSDictionary *dict in arrayData)
        {
            NSString *str = [dict valueForKey:@"question"];
            NSString *str1 = [dict valueForKey:@"option1"];
            NSString *str2 = [dict valueForKey:@"option2"];
            NSString *str3 = [dict valueForKey:@"option3"];
            NSString *str4 = [dict valueForKey:@"option4"];
            NSString *str5 = [dict valueForKey:@"ans"];
            NSLog(@"%@",str);
            [arrAddQues addObject:[NSString stringWithFormat:@"%@",str]];
            [arrAddOption1 addObject:[NSString stringWithFormat:@"%@",str1]];
            [arrAddOption2 addObject:[NSString stringWithFormat:@"%@",str2]];
            [arrAddOption3 addObject:[NSString stringWithFormat:@"%@",str3]];
            [arrAddOption4 addObject:[NSString stringWithFormat:@"%@",str4]];
            [arrAns addObject:[NSString stringWithFormat:@"%@",str5]];
        }

        NSLog(@"Final Array..............%@",arrAddQues);
        NSLog(@"Ans:---%@",arrAns);
        self.lblQues1.text = [arrAddQues objectAtIndex:0];
        [self.btnOption1 setTitle:[arrAddOption1 objectAtIndex:0] forState:UIControlStateNormal];
        [self.btnOption2 setTitle:[arrAddOption2 objectAtIndex:0] forState:UIControlStateNormal];
        [self.btnOption3 setTitle:[arrAddOption3 objectAtIndex:0] forState:UIControlStateNormal];
        [self.btnOption4 setTitle:[arrAddOption4 objectAtIndex:0] forState:UIControlStateNormal];

    }
- (IBAction)click_Previous:(id)sender {
    if (k == 1) {
        self.btnPrevious.hidden = YES;
        k--;
        self.lblQues1.text = [arrAddQues objectAtIndex:k];
        [self.btnOption1 setTitle:[arrAddOption1 objectAtIndex:k] forState:UIControlStateNormal];
        [self.btnOption2 setTitle:[arrAddOption2 objectAtIndex:k] forState:UIControlStateNormal];
        [self.btnOption3 setTitle:[arrAddOption3 objectAtIndex:k] forState:UIControlStateNormal];
        [self.btnOption4 setTitle:[arrAddOption4 objectAtIndex:k] forState:UIControlStateNormal];
 }

    else if (k < arrAddQues.count) {
        NSLog(@"value %d",k);
        self.btnNext.hidden = NO;
        self.btnPrevious.hidden = NO;
        self.btnFinish.hidden = YES;
        k--;
        self.lblQues1.text = [arrAddQues objectAtIndex:k];
        [self.btnOption1 setTitle:[arrAddOption1 objectAtIndex:k] forState:UIControlStateNormal];
        [self.btnOption2 setTitle:[arrAddOption2 objectAtIndex:k] forState:UIControlStateNormal];
        [self.btnOption3 setTitle:[arrAddOption3 objectAtIndex:k] forState:UIControlStateNormal];
        [self.btnOption4 setTitle:[arrAddOption4 objectAtIndex:k] forState:UIControlStateNormal];
ansCount--;
        NSLog(@"%d",ansCount);

        if (k == arrAddQues.count -1) {
            k--;
            self.btnNext.hidden = YES;
            self.btnFinish.hidden = NO;
            self.btnPrevious.hidden = NO;
        }

    }
}

- (IBAction)click_Next:(id)sender {
    if (k < arrAddQues.count -1) {
        self.btnNext.hidden = NO;
        self.btnFinish.hidden = YES;
        self.btnPrevious.hidden = NO;
        if (temp == 1) {
            temp = 0;
            if ([self.btnOption1.currentTitle isEqualToString:[arrAns objectAtIndex:k]]) {
                ansCount++;
                NSLog(@"%d",ansCount);

            }
        }
        else if(temp == 2)
        {
            temp = 0;
            if ([self.btnOption2.currentTitle isEqualToString:[arrAns objectAtIndex:k]]) {
                ansCount++;
                NSLog(@"%d",ansCount);

            }

        }
        else if (temp == 3)
        {
            temp = 0;
            if ([self.btnOption3.currentTitle isEqualToString:[arrAns objectAtIndex:k]]) {
                ansCount++;
                NSLog(@"%d",ansCount);

            }
        }
        else if (temp == 4)
        {
            temp = 0;
            if ([self.btnOption4.currentTitle isEqualToString:[arrAns objectAtIndex:k]]) {
                ansCount++;
                NSLog(@"%d",ansCount);

            }
        }
        else
        {
            NSLog(@"Wrong Answer!!!!!!!");
        }
        k++;
        self.lblQues1.text = [arrAddQues objectAtIndex:k];
        [self.btnOption1 setTitle:[arrAddOption1 objectAtIndex:k] forState:UIControlStateNormal];
        [self.btnOption2 setTitle:[arrAddOption2 objectAtIndex:k] forState:UIControlStateNormal];
        [self.btnOption3 setTitle:[arrAddOption3 objectAtIndex:k] forState:UIControlStateNormal];
        [self.btnOption4 setTitle:[arrAddOption4 objectAtIndex:k] forState:UIControlStateNormal];

        self.imageOp1.image = [UIImage imageNamed:@"checkcox.png"];
        self.imageOp2.image = [UIImage imageNamed:@"checkcox.png"];
        self.imageOp3.image = [UIImage imageNamed:@"checkcox.png"];
        self.imageOp4.image = [UIImage imageNamed:@"checkcox.png"];
        if (k == arrAddQues.count -1) {
            self.btnNext.hidden = YES;
            self.btnFinish.hidden = NO;
        }
    }
}

- (IBAction)click_Option1:(UIButton *)sender {
    temp = sender.tag;
    self.imageOp1.image = [UIImage imageNamed:@"checkcox-tic.png"];
    self.imageOp2.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp3.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp4.image = [UIImage imageNamed:@"checkcox.png"];
}

- (IBAction)click_Option2:(UIButton *)sender {
    temp = sender.tag;
    self.imageOp1.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp2.image = [UIImage imageNamed:@"checkcox-tic.png"];
    self.imageOp3.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp4.image = [UIImage imageNamed:@"checkcox.png"];
}

- (IBAction)click_Option3:(UIButton *)sender {
    temp = sender.tag;
    self.imageOp1.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp2.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp3.image = [UIImage imageNamed:@"checkcox-tic.png"];
    self.imageOp4.image = [UIImage imageNamed:@"checkcox.png"];
}

- (IBAction)click_Option4:(UIButton *)sender {
    temp = sender.tag;
    self.imageOp1.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp2.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp3.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp4.image = [UIImage imageNamed:@"checkcox-tic.png"];
}

维杰

You need to save selected item on - (IBAction)click_Option:(UIButton *)sender to ur array

add one more field to ur array like **selectedAns:"1"**

- (IBAction)click_Previous:(id)sender {

sender=[arr objectatindex:k];
switch(selectedAns)
{

case 1:
self.imageOp1.image = [UIImage imageNamed:@"checkcox-tic.png"];
    self.imageOp2.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp3.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp4.image = [UIImage imageNamed:@"checkcox.png"];
case 2:

self.imageOp2.image = [UIImage imageNamed:@"checkcox-tic.png"];
    self.imageOp1.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp3.image = [UIImage imageNamed:@"checkcox.png"];
    self.imageOp4.image = [UIImage imageNamed:@"checkcox.png"];
case 3:
case 4:

}
}

Save data to this format Array{ dictionary {
question:@"",ans1:"",ans2:@""...}, dictionary{question:@"",ans1:"",ans2:@""...},.....}
for easy access, Hope this will help u