我正在为iPhone开发应用程序。我的问题是如何每0.5秒显示一个不同文本的新标签。例如,它会显示蓝色,红色,绿色,橙色和紫色;一个接一个。现在我正在这样做:标签显示不能与iPhone应用程序即时通讯
results = aDictionary;
NSArray *myKeys = [results allKeys];
NSArray *sortedKeys = [myKey sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
int keyCount = [sortedKeys count];
while (flag == NO) {
NSTimeInterval timeMS = [startDate timeIntervalSinceNow] * -10000.0;
if (timeMS >= i) {
ii++;
i += 1000;
NSLog(@"endDate = %f", timeMS);
int randomNumber = rand() % keyCount + 1;
lblResult.text = [results valueForKey:[sortedKeys objectAtIndex:(randomNumber - 1)]];
result = [results valueForKey:[sortedKeys objectAtIndex:(randomNumber - 1)]];
lblResult.text = result;
}
if (ii > 25) {
flag = YES;
}
}
lblResult.text = [results valueForKey:[sortedKeys objectAtIndex:(sortedKeys.count - 1)]];
此函数在viewDidAppear函数中调用,并且当前不显示新标签。它只显示最后一个。我做错了什么?什么是最好的方法来解决这个问题?
[中的中间为()循环更新的UILabel]的可能重复(http://stackoverflow.com/问题/ 6363828 /更新 - 用于循环的中间的uilabel) – 2011-06-17 00:59:54
另外[动态更新UILabel](http://stackoverflow.com/questions/6336991/dynamically-updating-a-uilabel )和[文本字段等待,直到循环结束更新](http://stackoverflow.com/questio ns/5829977 /)和[更改标签文本的循环](http://stackoverflow.com/questions/6325202/objective-c-loop-to-change-label-text)和[调用睡眠和更新文本字段不起作用](http://stackoverflow.com/questions/5834062/calling-sleep5-and-updating-text-field-not-working) – 2011-06-17 01:01:16