提问人：Purushothaman 提问时间：4/26/2016 最后编辑：Nirav GadhiyaPurushothaman 更新时间：7/21/2016 访问量：98
如何设置时间延迟以从一个接一个地从数组中显示alertview？
How to set time delay for displaying the alertview from one after another From an array?
问：
如何设置时间延迟以从一个接一个地从数组中显示alertview？我在一个数组中有 5 个 alertview..每个警报视图将在一段时间后显示。
for (NSDictionary *temp in [RMUserDefaults userDetails].SharedFolders)
{
NSString *name = temp[@"Name"];
alert1= [[CustomUIAlertView alloc]initWithTitle:@"message" message:[NSString stringWithFormat:@"Message.", name] delegate:self cancelButtonTitle:@"CANCEL" otherButtonTitles:nil]];
[alert1 show];
}
答：
0赞
Nirav Gadhiya
4/26/2016
#1
试试这个......
-(void)test{
[self showAlertWithIndex:0];
}
-(void)showAlertWithIndex:(NSInteger)index
{
NSArray * arr = [RMUserDefaults userDetails].SharedFolders;
NSString *name = arr[index][@"Name"];
alert1= [[CustomUIAlertView alloc]initWithTitle:@"message" message:[NSString stringWithFormat:@"Message.", name] delegate:self cancelButtonTitle:@"CANCEL" otherButtonTitles:nil]];
alert1.tag = index;
[alert1 show];
[self performSelector:@selector(dismissAlertView:) withObject:alert1 afterDelay:2.0f];
// set delay in above line
}
-(void)dismissAlertView:(UIAlertView *)alert
{
[alert dismissWithClickedButtonIndex:0 animated:YES];
NSInteger index = alert.tag+1;
NSArray * arr = [RMUserDefaults userDetails].SharedFolders;
if (index < arr.count)
{
[self showAlertWithIndex:index];
}
}
编辑：
您需要在 alertview 委托中编写以下代码
NSInteger index = alert.tag+1;
NSArray * arr = [CustomUIAlertView userDetails].SharedFolders;
if (index < arr.count)
{
[self showAlertWithIndex:index];
}
0赞
Striker
4/26/2016
#2
使用dispatch_after
int i = 1;
for (NSDictionary *temp in [RMUserDefaults userDetails].SharedFolders) {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, i * delaySeconds * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
NSString *name = temp[@"Name"];
alert1= [[CustomUIAlertView alloc]initWithTitle:@"message" message:[NSString stringWithFormat:@"Message.", name] delegate:self cancelButtonTitle:@"CANCEL" otherButtonTitles:nil]];
[alert1 show];
});
i++;
}
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