uiprogressview

问题 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. 回答1: first you create IBOutlet in .h file IBOutlet UIProgressView * threadProgressView; Then in .m file in viewdidload first set progress to 0.0 and then call

问题 How can I display a UIProgressView with a percentage? 回答1: As Vlad mentioned you can have a method which updates the value of progressView and its associated label. Call the following method when any update happens. - (void)updateProgress { CGFloat stepSize = 0.1f; [self.progressView setProgress:self.progressView.progress+stepSize]; self.progressLabel.text = [NSString stringWithFormat:@"Completed : %.0f",self.progressView.progress*100]; } 回答2: The progress indicator control does not offer the

问题 I want to be able to execute a delay every time that a function loops through a loop. I already have a loop setup, as shown below: for (float batteryPercentage = 1; batteryPercentage <= 0; batteryPercentage -= 0.01) { double timeUntilNextDegreeDrop = 9.0; dispatch_time_t time = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(timeUntilNextDegreeDrop * NSEC_PER_SEC)); dispatch_after (time, dispatch_get_main_queue(), ^(void) { [batteryLevel setProgress:batteryPercentage animated:YES]; float

问题 I have an app using progress views with custom images. I use the code below: [cell.proStatus setTrackImage: [[UIImage imageNamed:@"CircleGrey.png"] resizableImageWithCapInsets:UIEdgeInsetsZero]]; [cell.proStatus setProgressImage: [[UIImage imageNamed:@"CirclePurple.png"] resizableImageWithCapInsets:UIEdgeInsetsZero]]; It all works fine in iOS 6 and 7.0 - BUT when updating to iOS 7.1 it doesn't show the images - just the small little thin line (the standard progress view). What do I do? I have

问题 my problem is this: I want to show ProgressView for files downloading.For some reason the ProgressView gradually rises, showing how much file is already downloaded , and just immediately fills up when files are still not downloaded! What do I need to fix or how to implement it? Here is my source code: - (IBAction)download:(id)sender { // Determile cache file path NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); progressSlider.progress = 0.0;

问题 I have this 3 classes. MyViewController.m (click to see code) MySync.m (click to see code) ImageDownload.m (click to see code) When I download a image, I try to update the UIProgressView in my UIViewController, but the update are delayed, and I see a strange problem (see the blank space in attach image). When all downloads are complete and execute the method "syncComplete" of "MyViewController", the method "dismissAlertView" is not triggered :S I hope somebody can help me. Thanks. 回答1:

问题 Imagine I have a UIProgressView that is showing the progress of some task (in this case triggered by a timer at a set interval). Under normal circumstances this works fine. It starts off at 0, so in my initial call to animate the progress view, everything works as expected. However, when I need to reset the progress, things start breaking. Imagine I have the following sequence of events: The user initiated a refresh, and so the progress view begins animating with a timer. After several

问题 So I have a UIProgressView that works as a sort of loading bar. The parent UIView is inside a navigation controller, and when the UIProgressView is full, I want to go to the next view in the navigation hierarchy. Any tips on how to do this? 回答1: Your progress view is probably being filled periodically by an NSTimer, correct? Let's say you want to fill it in ten parts over the course of ten seconds. Each NSTimer tick would add: progress = progress + 0.1; if (progress == 1.0) { [self

问题 I feel like this should be obvious to me, but for some reason I can't figure this out. I have a navigation interface with nav bar, tool bar, and primary view. Sometimes the user takes an action that causes a progress indicator to appear in the middle of the view. While the progress indicator (which is a custom UIView) in spinning in the middle, I want no touch input to be allowed to go to any of the underlying interface (main view, nav bar, toolbar, etc). But this doesn't seem trivial. I've

问题 I have an app processing a couple of images using Quartz, and i wanted to have a UIProgressView that changes after each actions. (e.g. 0.0 0.2 0.4 0.6 0.8 1.0) The problem is, it seems while my image is being processed the UI is completely locked, and the value only changes after all of the process is done (meaning it just gets to 1.0 without going through the sub-steps), Did any of you ever encounter this ? Pseudo: for(uint i=0;i<5;i++){ // Execute some Quartz based action here, such as