水平滚动的按钮在iOS中

Question

我已经通过按钮实现了以下水平滚动，但似乎只在5秒后开始滚动。它卡住了。我猜，UI正在被阻塞。

我有以下代码来创建，在我ViewDidLoad()

UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0,self.view.frame.size.height-100, self.view.frame.size.width, 100)]; 

    int x = 10; 
    for (int i = 0; i < 10; i++) { 
     UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(x,10,80,80)]; 
     [button setTitle:[NSString stringWithFormat:@"Button %d", i] forState:UIControlStateNormal]; 
     [button setTag:i]; 
     [button setBackgroundColor:[UIColor greenColor]]; 
     [button addTarget:self action:@selector(onClickofFilter:) forControlEvents:UIControlEventTouchUpInside]; 
     [scrollView addSubview:button]; 

     x += button.frame.size.width+10; 
    } 

    scrollView.contentSize = CGSizeMake(x, scrollView.frame.size.height); 
    scrollView.backgroundColor = [UIColor redColor]; 

    [self.view addSubview:scrollView]; 

有没有什么办法让它顺利？

Answer 1

请检查该代码：

UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 100)]; 

    int x = 0; 
    CGRect frame; 
    for (int i = 0; i < 10; i++) { 

    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 

    if (i == 0) { 
     frame = CGRectMake(10, 10, 80, 80); 
    } else { 
     frame = CGRectMake((i * 80) + (i*20) + 10, 10, 80, 80); 
    } 

    button.frame = frame; 
    [button setTitle:[NSString stringWithFormat:@"Button %d", i] forState:UIControlStateNormal]; 
    [button setTag:i]; 
    [button setBackgroundColor:[UIColor greenColor]]; 
    [button addTarget:self action:@selector(onClickofFilter:) forControlEvents:UIControlEventTouchUpInside]; 
    [scrollView addSubview:button]; 

    if (i == 9) { 
     x = CGRectGetMaxX(button.frame); 
    } 

    } 

    scrollView.contentSize = CGSizeMake(x, scrollView.frame.size.height); 
    scrollView.backgroundColor = [UIColor redColor]; 
    [self.view addSubview:scrollView]; 

Answer 2

下面是SWIFT 2.2版本以供参考类似的代码。

let scrollView = UIScrollView(frame: CGRectMake(self.view.frame.origin.x,self.view.frame.origin.y,self.view.frame.width,35)) 
    var x = 0 
    var frame : CGRect? 



    for i in 0..<7 { 

    let button = UIButton(type: .Custom) 

     if i == 0 { 

      frame = CGRectMake(10, 5, 80, 20) 

     }else{ 

      frame = CGRectMake(CGFloat(i * 120), 5, 80, 20) 


     } 


     button.frame = frame! 
     button.tag = i 
     button.backgroundColor = UIColor.clearColor() 
     button.addTarget(self, action: #selector(ProgramacioViewController.changeContentOnButtonSelection(_:)), forControlEvents: .TouchUpInside) 
     scrollView.addSubview(button) 


    } 


    scrollView.contentSize = CGSizeMake(840, scrollView.frame.size.height) 
    scrollView.backgroundColor = UIColor.clearColor() 
    self.view.addSubview(scrollView) 

Answer 3

UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 100)]; 

    int x = 0; 

    NSUInteger value= [userInfo count]; 
    for (int i = 0; i < value; i++) { 
     UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
     button.titleLabel.textAlignment = UITextAlignmentCenter; 
     [button setFont:[UIFont fontWithName:@"Lato-Medium" size:12]]; 
     button.layer.borderWidth = 1.0f; 
     button.layer.cornerRadius = 10; 
     button.layer.borderColor = [UIColor whiteColor].CGColor; 
     button.clipsToBounds = YES; 
     [button setTitle:[NSString stringWithFormat:@"%d",i] forState:UIControlStateNormal]; 
     [button setTag:i]; 
     [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
     [button setBackgroundColor:[UIColor clearColor]]; 
     button.titleLabel.lineBreakMode = NSLineBreakByWordWrapping; 
     button.titleLabel.textAlignment = NSTextAlignmentCenter; 
     [button addTarget:self action:@selector(onClickSwipeButton:) forControlEvents:UIControlEventTouchUpInside]; 
     button.frame = CGRectMake((i * 100) + (i*10) + 10, 0, 100, 35); 
     button.tag = i; 
     x = CGRectGetMaxX(button.frame); 
     [scrollView addSubview:button]; 

    } 
    scrollView.contentSize = CGSizeMake(x, scrollView.frame.size.height); 
    scrollView.backgroundColor = [UIColor clearColor]; 
    [self.randomView addSubview:scrollView];