Question

$query = $this->db->get("courses");
$data['courses'] = $query->result();
foreach($courses as $c){
    $this->db->select('*');
    $this->db->from('subjects');
    $this->db->where('id',$c->course);
    $query = $this->db->get("subjects");
    $data['subjects'] = $query->result();

    foreach($subjects as $s){
        $this->db->select('*');
        $this->db->from('tests');
        $this->db->where('id',$t->test);
        $query = $this->db->get("tests");
        $data['tests'] = $query->result();
    }
}

我想要打印具有顶部第一行和单列的课程表，其中包含数据$ c-＆gt; course 以及两列分别有数据$ s-＆gt; subject和$ t-＆gt;测试的行...

Answer 1

你可以像这样使用课程的第一行，科目和测试

的下两行

-(void)makeFiveButton {

UIButton *button1 = [[UIButton alloc]init];
button1.backgroundColor = [UIColor greenColor];
UIButton *button2 = [[UIButton alloc]init];
button2.backgroundColor = [UIColor redColor];
UIButton *button3 = [[UIButton alloc]init];
button3.backgroundColor = [UIColor yellowColor];
UIButton *button4 = [[UIButton alloc]init];
button4.backgroundColor = [UIColor purpleColor];
UIButton *button5 = [[UIButton alloc]init];
button5.backgroundColor = [UIColor brownColor];



UIStackView *stackView = [[UIStackView alloc]init];
stackView.axis = UILayoutConstraintAxisHorizontal;
stackView.distribution = UIStackViewDistributionFill;
stackView.alignment = UIStackViewAlignmentFill;
stackView.spacing = 10;


[stackView addArrangedSubview:button1];
[stackView addArrangedSubview:button2];
[stackView addArrangedSubview:button3];
[stackView addArrangedSubview:button4];
[stackView addArrangedSubview:button5];
[self.view addSubview:stackView];

button1.translatesAutoresizingMaskIntoConstraints = NO;
button2.translatesAutoresizingMaskIntoConstraints = NO;
button3.translatesAutoresizingMaskIntoConstraints = NO;
button4.translatesAutoresizingMaskIntoConstraints = NO;
button5.translatesAutoresizingMaskIntoConstraints = NO;
stackView.translatesAutoresizingMaskIntoConstraints = NO;


[button1.heightAnchor constraintEqualToConstant:44].active = true;
[button1.widthAnchor constraintEqualToConstant:44].active = true;

[button2.heightAnchor constraintEqualToConstant:44].active = true;
[button2.widthAnchor constraintEqualToConstant:44].active = true;

[button3.heightAnchor constraintEqualToConstant:44].active = true;
[button3.widthAnchor constraintEqualToConstant:44].active = true;

[button4.heightAnchor constraintEqualToConstant:44].active = true;
[button4.widthAnchor constraintEqualToConstant:44].active = true;

[button5.heightAnchor constraintEqualToConstant:44].active = true;
[button5.widthAnchor constraintEqualToConstant:44].active = true;

[stackView.centerXAnchor constraintEqualToAnchor:self.view.centerXAnchor].active = true;
[stackView.centerYAnchor constraintEqualToAnchor:self.view.centerYAnchor].active = true;

}

CodeIgniter：在每个'foreach（）'命令后获取数据

1 个答案: