Objective c 指定了UIScrollView与UIProgressView的滚动

我想在导航栏下添加一个进度条，它将指示UIScrollView滚动的进度，我使用（不工作）：我使用

---

现在检查我创建了一个演示：

       #import "ViewController.h"

    @interface ViewController ()<UIScrollViewDelegate>{
        UIScrollView *scroll;
        UIProgressView *indicater;
        }
    @end

    @implementation ViewController



    - (void)viewDidLoad {
        indicater=[[UIProgressView alloc]initWithFrame:CGRectMake(0, 65, 320,10)];
        indicater.backgroundColor=[UIColor redColor];
        indicater.progress = 0.0;
        indicater.hidden=false;


        [self.view addSubview:indicater];

        scroll=[[UIScrollView alloc]initWithFrame:CGRectMake(10, 80,300, 200)];
        scroll.backgroundColor=[UIColor greenColor];
        scroll.userInteractionEnabled=YES;
        scroll.delegate=self;
        scroll.contentSize = CGSizeMake(300 ,5000);

        [self.view addSubview:scroll];



    }
    - (void)scrollViewDidScroll:(UIScrollView *)scrollView{

        CGPoint offset = scroll.contentOffset;
        CGRect bounds = scroll.bounds;
        CGSize size = scroll.contentSize;
        UIEdgeInsets inset = scroll.contentInset;
        float y = offset.y + bounds.size.height - inset.bottom;
        float h = size.height;
        NSLog(@"%f",y);
        NSLog(@"%f",h);
        NSNumber *num=[NSNumber numberWithFloat:y];
        NSNumber *num1=[NSNumber numberWithFloat:h];



    [self UpdateProgressbar:num TotalscrollLenrth:num1];

}

-(void)UpdateProgressbar:(NSNumber*)currentscrollLenrth TotalscrollLenrth:(NSNumber*)n
{

    NSString *totalLength = [NSString stringWithFormat:@"%@", n];
    NSLog(@"%@", totalLength);

    NSString *currentScrool = [NSString stringWithFormat:@"%@", currentscrollLenrth];
    NSLog(@"%@", currentScrool);
    if (currentscrollLenrth <= n) {
        [indicater setProgress:([currentScrool intValue]/[totalLength floatValue])];
    }
    else {
                  // do somithig

    }
}

#导入“ViewController.h”
@界面视图控制器（）{
UIScrollView*滚动；
UIProgressView*指示器；
}
@结束
@实现视图控制器
-（无效）viewDidLoad{
指示符=[[UIProgressView alloc]initWithFrame:CGRectMake（0,65320,10）]；
指示剂。背景色=[UIColor REDCLOR]；
指标。进度=0.0；
指示符。隐藏=假；
[self.view addSubview:indicater]；
scroll=[[UIScrollView alloc]initWithFrame:CGRectMake（108300200）]；
scroll.backgroundColor=[UIColor-greenColor]；
scroll.userInteractionEnabled=YES；
scroll.delegate=self；
scroll.contentSize=CGSizeMake（3005000）；
[self.view addSubview:滚动]；
}
-（无效）scrollViewDidScroll：（UIScrollView*）scrollView{
CGPoint offset=scroll.contentOffset；
CGRect bounds=scroll.bounds；
CGSize size=scroll.contentSize；
UIEdgeInsets inset=scroll.contentInset；
浮动y=偏移量.y+bounds.size.height-插入底部；
浮动h=尺寸。高度；
NSLog（@“%f”，y）；
NSLog（@“%f”，h）；
NSNumber*num=[NSNumber numberWithFloat:y]；
NSNumber*num1=[NSNumber numberWithFloat:h]；
[self-UpdateProgressbar:num TotalscrollLenrth:num1]；
}
-（void）UpdateProgressbar:（NSNumber*）currentscrollLenrth TotalscrollLenrth:（NSNumber*）n
{
NSString*总长度=[NSString stringWithFormat:@“%@”，n]；
NSLog（@“%@”，总长度）；
NSString*currentScrool=[NSString stringWithFormat:@“%@”，currentscrollLenrth]；
NSLog（@“%@”，currentScrool）；
如果（currentscrollLenrth）是的，这是可能的……如果你这样问，你会得到选票…………如果你面临任何问题，你需要尝试一下……请在这里发布……不要问信息我想把这个问题放在上面hold@NAVEENKUMAR确切地说，我对此有问题，我会-（void）scrollViewDidScroll:（UIScrollView*）scrollView{self.progressView.progress=scrollView.contentOffset.y；}但它不起作用您不能只分配
contentOffset.y
，进度从值
（0-1）
开始工作您的值应该介于这两者之间。
       #import "ViewController.h"

    @interface ViewController ()<UIScrollViewDelegate>{
        UIScrollView *scroll;
        UIProgressView *indicater;
        }
    @end

    @implementation ViewController



    - (void)viewDidLoad {
        indicater=[[UIProgressView alloc]initWithFrame:CGRectMake(0, 65, 320,10)];
        indicater.backgroundColor=[UIColor redColor];
        indicater.progress = 0.0;
        indicater.hidden=false;


        [self.view addSubview:indicater];

        scroll=[[UIScrollView alloc]initWithFrame:CGRectMake(10, 80,300, 200)];
        scroll.backgroundColor=[UIColor greenColor];
        scroll.userInteractionEnabled=YES;
        scroll.delegate=self;
        scroll.contentSize = CGSizeMake(300 ,5000);

        [self.view addSubview:scroll];



    }
    - (void)scrollViewDidScroll:(UIScrollView *)scrollView{

        CGPoint offset = scroll.contentOffset;
        CGRect bounds = scroll.bounds;
        CGSize size = scroll.contentSize;
        UIEdgeInsets inset = scroll.contentInset;
        float y = offset.y + bounds.size.height - inset.bottom;
        float h = size.height;
        NSLog(@"%f",y);
        NSLog(@"%f",h);
        NSNumber *num=[NSNumber numberWithFloat:y];
        NSNumber *num1=[NSNumber numberWithFloat:h];



    [self UpdateProgressbar:num TotalscrollLenrth:num1];

}

-(void)UpdateProgressbar:(NSNumber*)currentscrollLenrth TotalscrollLenrth:(NSNumber*)n
{

    NSString *totalLength = [NSString stringWithFormat:@"%@", n];
    NSLog(@"%@", totalLength);

    NSString *currentScrool = [NSString stringWithFormat:@"%@", currentscrollLenrth];
    NSLog(@"%@", currentScrool);
    if (currentscrollLenrth <= n) {
        [indicater setProgress:([currentScrool intValue]/[totalLength floatValue])];
    }
    else {
                  // do somithig

    }
}