[英]Update UIProgressView from NSProgress
I have this observer and I am trying to update my UIProgressView in this way: 我有这个观察者,我试图以这种方式更新我的UIProgressView:
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
NSProgress *progress = object;
NSLog(@"PROG: %f", progress.fractionCompleted);
[progressBar setProgress:_progressReceive.fractionCompleted animated:YES];
// Check which KVO key change has fired
if ([keyPath isEqualToString:kProgressCancelledKeyPath]) {
// Notify the delegate that the progress was cancelled
[progressBar removeFromSuperview];
NSLog(@"CANCEL");
}
else if ([keyPath isEqualToString:kProgressCompletedUnitCountKeyPath]) {
// Notify the delegate of our progress change
if (progress.completedUnitCount == progress.totalUnitCount) {
// Progress completed, notify delegate
NSLog(@"COMPLETE");
[progressBar removeFromSuperview];
}
}
}
The NSLog is displaying data: NSLog正在显示数据:
...
2013-10-29 19:55:26.831 Cleverly[2816:6103] PROG: 0.243300
2013-10-29 19:55:26.835 Cleverly[2816:6103] PROG: 0.243340
2013-10-29 19:55:26.838 Cleverly[2816:6103] PROG: 0.243430
...
But the progressBar is not updating. 但progressBar没有更新。 I notice that if I use an NSTimer instead it does update:
我注意到如果我使用NSTimer而不是更新:
-(void)progressSend:(NSTimer*)timer{
NSLog(@"Fraction Complete: %@", [NSNumber numberWithDouble:progressSend.fractionCompleted]);
[progressBar setProgress:progressSend.fractionCompleted animated:YES];
}
Why is this?? 为什么是这样??
try to perform on main thread: 尝试在主线程上执行:
[self performSelectorOnMainThread:@selector(updateProgress:) withObject:[NSArray arrayWithObjects:progressBar, progress.fractionCompleted, nil] waitUntilDone:NO];
Method: 方法:
-(void) updateProgress:(NSArray*)array
{
UIProgressView *progressBar = [array objectAtIndex:0];
NSNumber *number = [array objectAtIndex:1];
[progressBar setProgress:number.floatValue animated:YES];
}
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