我有一个UIButton,我正在使用从XML文件解析的内容动态添加(它也被缓存)。
我第一次运行应用时,按钮的动作没有被调用 - 但是它的图像和其他所有内容都加载得很好。我第二次运行应用程序,按钮工作。
第一次运行应用程序时,为什么没有调用按钮动作的任何线索?
- (void)fetchHeader
{
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
// Initiate the request...
channel1 = [[FeedStore sharedStore] fetchFeaturedHeaderWithCompletion:
^(RSSChannel *obj, NSError *err) {
if(!err) {
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
// Set our channel to the merged one
channel1 = obj;
RSSItem *d = [[channel1 items] objectAtIndex:0];
RSSItem *c = [[channel1 items] objectAtIndex:1];
NSString *param = [d photoURL]; // the URL from the XML
NSString *param1 = [c photoURL]; // the URL from the XML
featured1 = [[UIButton alloc] init];
[featured1 addTarget:self action:@selector(featuredButtonPress:) forControlEvents:UIControlEventTouchUpInside];
[featured1 setFrame:CGRectMake(18, 20, 123, 69)];
[featured1 setImageWithURL:[NSURL URLWithString:param] placeholderImage:[UIImage imageNamed:@"featuredheaderbg.png"]];
featured1.tag = 1;
[[self view] addSubview:featured1];
}
}];
}
答案 0 :(得分:5)
问题是UIView正在掩盖它下方的按钮。因为视图是透明的,所以我没有意识到它覆盖了任何东西。