从xib加载并在第一次显示时，View有错误的帧

Question

我创建了一个在MapView注释标注中显示的视图。 如果我没有使用xib并使用initWithFrame实例化此视图，则没有问题。 但是如果我使用xib，地图上显示的尺寸应该比应该更大。

视野中的代码：

@interface CalloutContentView : UIView
@property (nonatomic) Visit *visit;
+ (id)customView;
@end 

#import "CalloutContentView.h"
@interface CalloutContentView ()
@property (weak, nonatomic) IBOutlet UILabel *title;

@property (weak, nonatomic) IBOutlet UILabel *subtitle;
@property (weak, nonatomic) IBOutlet UISegmentedControl *sc;
@end
@implementation CalloutContentView

+ (id)customView
{
    CalloutContentView *customView = [[[NSBundle mainBundle] loadNibNamed:@"CalloutContentView" owner:self options:nil] lastObject];

    if ([customView isKindOfClass:[CalloutContentView class]])
        return customView;
    else
        return nil;
}

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {            
//        _title = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, w, 18)];
        _title.font = [UIFont boldSystemFontOfSize:15.0];
        //        _title.textAlignment = NSTextAlignmentLeft;
        _title.textColor = [UIColor colorWithWhite:0.199 alpha:1.000];
        _title.numberOfLines = 1;
        _title.backgroundColor = [UIColor yellowColor];

        [self addSubview:_title];

//        _subtitle = [[UILabel alloc] initWithFrame:CGRectMake(0, 25.0, w, 14)];
        _subtitle.font = [UIFont systemFontOfSize:12.0];
        _subtitle.textAlignment = NSTextAlignmentLeft;
        _subtitle.textColor = [UIColor colorWithWhite:0.239 alpha:1.000];
        _subtitle.backgroundColor = [UIColor clearColor];

        [self addSubview:_subtitle];

//        _sc = [[UISegmentedControl alloc]initWithItems:@[@"One",@"Two"]];

        _sc.frame = CGRectMake(0, self.frame.size.height - 30, w, 30);
        [_sc addTarget:self action:@selector(segmentedControlValueDidChange:) forControlEvents:UIControlEventValueChanged];
        [self addSubview:_sc];
    }
    return self;
}

@ end

在MapViewController中：

- (void)popupMapCalloutView {

    // Change this for creating your Callout View
    CalloutContentView *customView = [CalloutContentView customView];

    // CalloutContentView *customView = [[CalloutContentView alloc]initWithFrame: CGRectMake(0, 0, 10, 90)];

    // if you provide a custom view for the callout content, the title and subtitle will not be displayed
    _calloutView.contentView = customView;
    VisitAnnotationView *bottomPin = _visitAnnotationViews[_idAnn];
    bottomPin.calloutView = _calloutView;
    [_calloutView presentCalloutFromRect:bottomPin.bounds
                                  inView:bottomPin
                       constrainedToView:_mapView
                permittedArrowDirections:SMCalloutArrowDirectionAny
                                animated:YES];
}

使用xib时的样子如下：