Question

我有一个UIView的子类，我从NIB文件加载。我的NIB文件包含一个UIButton和一个IBOutlet，名为 clock

@property (strong, nonatomic) IBOutlet UIButton *clock;

我的界面构建器上的时钟按钮中设置的文本显示出来！但是我从initWithCoder添加的另一个子视图并不是。这是为什么？

.h文件

@interface TWTimerView : UIView

@property (strong, nonatomic) IBOutlet UIButton *clock;

@property (strong, nonatomic) UIImageView *circle;
@property (strong, nonatomic) UIImageView *pointer;
@property (strong, nonatomic) UIImageView *tick;

@property (strong, nonatomic) UIImageView *circleGlow;
@property (strong, nonatomic) UIImageView *pointerGlow;
@property (strong, nonatomic) UIImageView *tickGlow;

@end

.m文件

@implementation TWTimerView

-(id)initWithCoder:(NSCoder *)aDecoder {

    self = [super initWithCoder:aDecoder];
    if(self) {

        self.backgroundColor = [UIColor clearColor];

        _circle  = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"circle"]];
        _pointer = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"pointer"]];
        _tick    = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"tick"]];

        [_clock addSubview:_circle];
        [_clock addSubview:_pointer];
        [_clock addSubview:_tick];

    }
    return self;
}

- (id)initWithFrame:(CGRect)frame
{

    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        TWTimerView *view= [[[NSBundle mainBundle] loadNibNamed:@"TimerView" owner:self options:nil] objectAtIndex:0];
        [self addSubview:view];

    }
    return self;
}

@end

谢谢！

Answer 1

这是我要做的：如果您不需要使用框架，请删除initWithFrame方法并使用其他方法来帮助您加载视图，如下所示。

+ (id)loadViewFromNIBFile {
    NSArray * array = [[NSBundle mainBundle] loadNibNamed:@"TimerView" owner:self options:nil];
    //You may want to assert array only contains one element here
    TWTimerView * view = (TWTimerView *)[array objectAtIndex:0];
    NSAssert([view isKindOfClass:TWTimerView.class], @"Unexpected class");
    [view _setDefaultComponents];
    return view;
}

- (void)_setDefaultComponents {
    self.backgroundColor = [UIColor clearColor];
    _circle  = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"circle"]];
    _pointer = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"pointer"]];
    _tick    = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"tick"]];
    [_clock addSubview:_circle];
    [_clock addSubview:_pointer];
    [_clock addSubview:_tick];
}

致电[TWTimerView loadViewFromNIBFile]以获取您的观看实例。

Answer 2

你的TWTimerView有一个笔尖，你有一个UIButton吗？你有一个UIView-Subclass，它为你的UIButton添加了三个UIImageViews，为什么你这样做？！

为什么不对UIButton进行子类化并在那里设置UIImageView？

根本我会改变它：

@implementation TWTimerView

    - (id)initWithFrame:(CGRect)frame
    {

        self = [super initWithFrame:frame];
        if (self) {
            // Initialization code
            [[[NSBundle mainBundle] loadNibNamed:@"TimerView" owner:self options:nil] objectAtIndex:0];
            self.backgroundColor = [UIColor clearColor];

            _circle  = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"circle"]];
            _pointer = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"pointer"]];
            _tick    = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"tick"]];

            [_clock addSubview:_circle];
            [_clock addSubview:_pointer];
            [_clock addSubview:_tick];

        }
        return self;
    }

@end

为什么从自定义UIView向UIButton添加子视图不会显示添加的子视图？

2 个答案: