简单的自定义UIView类破碎

时间:2012-11-08 00:07:58

标签: iphone objective-c ipad uiview subclass

我已经创建了一个UIView的简单子类,它有一些子视图,但是它因为我看不到的原因而破坏。

在我的故事板视图控制器中,我添加了一个UIView,并将其设置为我想要的形状,并将自定义类添加到其中。我的子类的内容如下:

@implementation PersonDetailCell

@synthesize button, requiredMarker, textField;

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code

    }
    return self;
}

-(void)layoutSubviews
{
    [self setBackgroundColor:[UIColor colorWithRed:87.0f/255.0f green:153.0f/255.0f blue:191.0f/255.0f alpha:1.0f]];

    textField = [[DetailTextField alloc] initWithFrame:CGRectMake(10, 0, self.frame.size.width -20, self.frame.size.height)];
    [textField setFont:[UIFont fontWithName:@"Helvetica" size:14.0f]];
    [textField setTextColor:[UIColor whiteColor]];
    [textField setHidden:YES];
    [self addSubview:textField];

    button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
    [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [button setHidden:YES];
    [self addSubview:button];

    requiredMarker = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 4, 22)];
    [requiredMarker setBackgroundColor:[UIColor redColor]];
    [requiredMarker setHidden:YES];
    [self addSubview:requiredMarker];
}

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    // Drawing code
}
*/

@end

然后在我的视图控制器代码中,我导入了我的子类,并在我的故事板中将它的IBOutlet连接到我的视图中。在我的视图控制器的viewDidLoad中,我也尝试设置此视图的背景颜色,但没有任何反应。

我的所有代码都运行没有崩溃,但我的问题是:

  1. 我无法从视图控制器(或任何其他属性)设置背景颜色。

  2. 当我运行应用程序时,高度超过我在故事板中设置的高度(宽度很好),但我无处更改视图的高度。

  3. 有什么想法吗?我是否以某种方式使用了错误的方法?

    感谢。

2 个答案:

答案 0 :(得分:1)

如果是表格单元格,则该类应该扩展UITableViewCell。可以在故事板上添加按钮和文本字段 - 然后您可以使用struts和弹簧(Size Inspector窗格)来确保视图正确调整大小。我不认为layoutSubviews应该用于添加新的UI元素(如果需要手动调整,可能需要调整大小)。

答案 1 :(得分:0)

以下是一些有效的代码:

@interface ChildView()
@property (strong, nonatomic) UITextField *textField;
@property (strong, nonatomic) UIButton *button;
@property (strong, nonatomic) UIImageView *requiredMarker;
@end

@implementation ChildView

@synthesize textField= _textField;
@synthesize button = _button;
@synthesize requiredMarker = _requiredMarker;

-(id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self)
    {
        [self setBackgroundColor:[UIColor colorWithRed:87.0f/255.0f green:153.0f/255.0f blue:191.0f/255.0f alpha:1.0f]];

        self.textField = [[UITextField alloc] init];
        [self.textField setFont:[UIFont fontWithName:@"Helvetica" size:14.0f]];
        [self.textField setTextColor:[UIColor whiteColor]];
        self.textField.text = @"Test text";
        [self addSubview:self.textField];

        self.button = [[UIButton alloc] init];
        self.button.backgroundColor = [UIColor greenColor];
        [self addSubview:self.button];

        self.requiredMarker = [[UIImageView alloc] init];
        [self.requiredMarker setBackgroundColor:[UIColor redColor]];
        [self addSubview:self.requiredMarker];
    }
    return self;
}

-(void)layoutSubviews
{
    CGSize hostSize = self.frame.size;
    float length = 22;
    self.textField.frame = CGRectMake(10, length, hostSize.width, hostSize.height-length);
    self.button.frame = CGRectMake(0, 0, hostSize.width, length);
    self.requiredMarker.frame = CGRectMake(0, 0, 4, length);
}

@end