ios – 透明UITableViewHeaderFooterView

概述我想为这个UITableView制作一个自定义标题视图,我希望它是透明的. 我的代码… 接口… typedef void(^ActionBlock)();@interface MyViewHeaderView : UITableViewHeaderFooterView@property (nonatomic, strong) UIImageView *flagImageView;@pro 我想为这个UItableVIEw制作一个自定义标题视图,我希望它是透明的.

我的代码…

接口…

typedef voID(^ActionBlock)();@interface MyVIEwheaderVIEw : UItableVIEwheaderfooterVIEw@property (nonatomic,strong) UIImageVIEw *flagImageVIEw;@property (nonatomic,strong) UILabel *leaguenameLabel;@property (nonatomic,copy) ActionBlock tapAction;@end

实现…

#import "MyVIEwheaderVIEw.h"@interface MyVIEwheaderVIEw ()@end@implementation MyVIEwheaderVIEw- (ID)initWithReuseIDentifIEr:(Nsstring *)reuseIDentifIEr{    self = [super initWithReuseIDentifIEr:reuseIDentifIEr];    if (self) {        // Add customisation here...        // I have trIEd everything here...        self.tintcolor = [UIcolor colorWithWhite:0.961 Alpha:1.0];        self.Alpha = 0.5;        // self.contentVIEw.backgroundcolor = [UIcolor colorWithWhite:0.5 Alpha:0.5];        // self.backgroundcolor = [UIcolor colorWithWhite:0.5 Alpha:0.5];        // can't remember what else.        // none of it makes it transparent. It sets the colour against        // a white background. i.e. 50% transparent but with a white opaque background.        // so I can't see the content of the table scrolling behind it.        self.flagImageVIEw = [[UIImageVIEw alloc] init];        self.flagImageVIEw.image = [UIImage imagenamed:@"placeholder_flag"];        [self.flagImageVIEw setTranslatesautoresizingMaskIntoConstraints:NO];        [self.contentVIEw addSubvIEw:self.flagImageVIEw];        self.leaguenameLabel = [[UILabel alloc] init];        [self.leaguenameLabel setTranslatesautoresizingMaskIntoConstraints:NO];        [self.contentVIEw addSubvIEw:self.leaguenameLabel];        UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(vIEwTapped)];        tapGestureRecognizer.numberOfTapsrequired = 1;        tapGestureRecognizer.numberOftouchesrequired = 1;        [self.contentVIEw addGestureRecognizer:tapGestureRecognizer];        [self setupConstraints];    }    return self;}- (voID)setupConstraints{    // adding constraints...}- (voID)vIEwTapped{    self.tapAction();}@end

在我的UItableVIEwDelegate我正在加载头像…

- (UIVIEw *)tableVIEw:(UItableVIEw *)tableVIEw vIEwForheaderInSection:(NSInteger)section{    MyVIEwheaderVIEw *headerVIEw = [tableVIEw dequeueReusableheaderfooterVIEwWithIDentifIEr:@"headerVIEw"];    League *league = self.leagues[(NSUInteger) section];    headerVIEw.leaguenameLabel.text = league.name;    headerVIEw.tapAction = ^(){        [self leagueTapped:league];    };    return headerVIEw;}

这是正常工作,标题正确显示.只是没有透明度.

我想要一个标题视图,如标准视图,您可以在其中查看在其后面滚动的表视图内容.

请你让我知道如何做到这一点.

解决方法 请原谅我无法使用stackoverflow ….

这是我如何设法实现它,使用这两个这些UItablevIEwDelegate方法：

- (voID)tableVIEw:(UItableVIEw *)tableVIEw willdisplayheaderVIEw:(UIVIEw *)vIEw forSection:(NSInteger)section {  if ([vIEw isMemberOfClass:[UItableVIEwheaderfooterVIEw class]]) {    ((UItableVIEwheaderfooterVIEw *)vIEw).backgroundVIEw.backgroundcolor = [UIcolor clearcolor];  }}- (UIVIEw *)tableVIEw:(UItableVIEw *)tableVIEw vIEwForheaderInSection:(NSInteger)section {  UItableVIEwheaderfooterVIEw *FeedheaderVIEw = [tableVIEw dequeueReusableheaderfooterVIEwWithIDentifIEr:@"headerIDentifIEr"];  //Other customizations  return FeedheaderVIEw;}

希望有帮助,让我永远弄清楚.似乎backgroundVIEw不是在init中创建的,所以颜色不能被覆盖在那里.

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