如何使用iPhone应用程序中的进度条

问题描述：

在我的iPhone应用程序中，我从FTP服务器下载一些数据。显示我正在使用的操作 UIActivityIndicator 。如果我把 UIProgressView 放在那里而不是 UIActivityIndicator ，那将更合适。下载某些数据时如何使用 UIProgressView ？任何人都可以给我一个教程链接或示例代码吗？在此先感谢。

In my iPhone app I am downloading some data from an FTP server. To show the action I am using UIActivityIndicator. If I put UIProgressView there instead of UIActivityIndicator, it will be more appropriate. How do I use UIProgressView while downloading some data? Can anybody give me a tutorial link or example code? Thanks in advance.

答

首先在.h文件中创建IBOutlet

first you create IBOutlet in .h file

IBOutlet UIProgressView * threadProgressView;

然后在viewdidload中的.m文件中首先将进度设置为0.0，然后调用makeMyProgressMoving方法

Then in .m file in viewdidload first set progress to 0.0 and then call makeMyProgressMoving method

    threadProgressView.progress = 0.0;
    [self performSelectorOnMainThread:@selector(makeMyProgressBarMoving) withObject:nil waitUntilDone:NO];

然后添加以下方法

- (void)makeMyProgressBarMoving {

        float actual = [threadProgressView progress];
        if (actual < 1) {
            threadProgressView.progress = actual + ((float)recievedData/(float)xpectedTotalSize);
            [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(makeMyProgressBarMoving) userInfo:nil repeats:NO];
        }
        else{



        }

    }

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如何使用iPhone应用程序中的进度条

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