[英]Bring UIimageView to front
我有一个ViewController,其中有一个UIScrollView。 在此我有一个UIView和UIView我必须添加标签和图像。 图片应该在我的标签上方。
顺序为Controller >> ScrollView >> UIView >> UILAbel >> UIImageView
但我不能将UIimageView添加到视图。
这是我的代码
scrollView =[[UIScrollView alloc]init];
[scrollView setFrame:CGRectMake(0, 0, 320, 480)];
[scrollView setContentSize:CGSizeMake(320,2820)];
[scrollView setBackgroundColor:[UIColor groupTableViewBackgroundColor]];
[scrollView setScrollEnabled:YES];
[scrollView setShowsHorizontalScrollIndicator:YES];
[scrollView setShowsVerticalScrollIndicator:NO];
[self.view addSubview:scrollView];
UIView *firstView = [[UIView alloc]initWithFrame:CGRectMake(5, 5, 310, 300)];
firstView.backgroundColor = [UIColor whiteColor];
[scrollView addSubview:firstView];
UILabel *label =[[UILabel alloc]initWithFrame:CGRectMake(65, 3, 180, 50)];
label.text = @"ABC";
label.textAlignment =NSTextAlignmentCenter;
label.textColor = [UIColor colorWithRed:74.0/255.0 green:144.0/255.0 blue:226.0/255.0 alpha:1];
label.font=[UIFont fontWithName:@"Helvetica-Bold" size:18];
[firstView addSubview:label];
imgView = [[UIImageView alloc]initWithFrame:CGRectMake(115, 0, 90, 90)];
imgView.image = [UIImage imageNamed:@"thumbs4.png"];
[self.view bringSubviewToFront:imgView];
[self.view BringSubviewToFront:imgView]此行不执行任何操作
您应该在操作前将图像视图添加到self.view中。 但是,如果它将是最后添加的子视图,则不必将其放在最前面。
imgView = [[UIImageView alloc]initWithFrame:CGRectMake(115, 0, 90, 90)];
imgView.image = [UIImage imageNamed:@"thumbs4.png"];
[self.view addSubview:imgView] // added as subview
[self.view bringSubviewToFront:imgView]; // not really needed. imgView is actually in front
UIScrollView *scrollView =[[UIScrollView alloc]init];
[scrollView setFrame:CGRectMake(0, 0, 320, 480)];
[scrollView setContentSize:CGSizeMake(320,2820)];
[scrollView setBackgroundColor:[UIColor groupTableViewBackgroundColor]];
[scrollView setScrollEnabled:YES];
[scrollView setShowsHorizontalScrollIndicator:YES];
[scrollView setShowsVerticalScrollIndicator:NO];
[self.view addSubview:scrollView];
UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(115, 0, 90, 90)];
imgView.image = [UIImage imageNamed:@"dream.jpg"];
[self.view addSubview:imgView];
UIView *firstView = [[UIView alloc]initWithFrame:CGRectMake(5, 5, 310, 300)];
firstView.backgroundColor = [UIColor blueColor];
[scrollView addSubview:firstView];
UILabel *label =[[UILabel alloc]initWithFrame:CGRectMake(65, 3, 180, 50)];
label.text = @"ABC";
label.textAlignment =NSTextAlignmentCenter;
label.textColor = [UIColor colorWithRed:74.0/255.0 green:144.0/255.0 blue:226.0/255.0 alpha:1];
label.font=[UIFont fontWithName:@"Helvetica-Bold" size:18];
[firstView addSubview:label];
我得到像
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