注意：FSExtendedAlertKit 已过时。使用 UIAlertController，这是很好的。
FSExtendedAlertKit 提供简单的用于显示进度的 UIAlertView 替代品。共有五个主要类
FSBlockButton 是一个简单的 NSObject 子类，提供了一个带有标题和回调块的按钮包装器
FSBlockButton *blockButton = [FSBlockButton blockButtonWithTitle:@"A button" block:^ {
// do something when the button is pressed
}];FSAlertView 是一个包装器，提供基于块回调而不是标准代理实现的回调
FSBlockButton *cancelButton = [FSBlockButton blockButtonWithTitle:@"Cancel" block:^ {
// do something when the cancel button is pressed
}];
FSBlockButton *confirmButton = [FSBlockButton blockButtonWithTitle:@"Confirm" block:^ {
// do something when the confirm button is pressed
}];
FSAlertView *alert = [[FSAlertView alloc] initWithTitle:@"Alert" message:@"Something needs your confirmation." cancelButton:cancelButton otherButtons:confirmButton, nil];
[alert show];FSActivityIndicatorAlertView 通过在 UIAlertView 内部显示 UIActivityIndicatorView 来显示不确定的进度
FSActivityIndicatorAlertView *alert = [[FSActivityIndicatorAlertView alloc] initWithTitle:@"Alert" message:@"Something is happening and might take a while."];
[alert show];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^ {
// do something that takes a while
dispatch_async(dispatch_get_main_queue(), ^ {
[alert dismiss:YES];
});
});FSProgressAlertView 通过在 UIAlertView 内部显示 UIProgressView 来显示确定性的进度
FSProgressAlertView *alert = [[FSProgressAlertView alloc] initWithTitle:@"Alert" message:@"Something is happening and might take a while."];
[alert show];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^ {
// do something that takes a while
[alert setProgress:0.1f animated:YES];
...
[alert setProgress:0.5f animated:YES];
...
[alert setProgress:0.8f animated:YES];
...
[alert setProgress:1.f animated:YES];
dispatch_async(dispatch_get_main_queue(), ^ {
[alert dismiss:YES];
});
});FSActionSheet 是一个包装器，提供基于块的回调而不是标准代理实现
FSBlockButton *cancelButton = [FSBlockButton blockButtonWithTitle:@"Cancel" block:^ {
// do something when the cancel button is pressed
}];
FSBlockButton *deleteButton = [FSBlockButton blockButtonWithTitle:@"Delete" block:^ {
// do something when the delete button is pressed
}];
FSBlockButton *editButton = [FSBlockButton blockButtonWithTitle:@"Edit" block:^ {
// do something when the edit button is pressed
}];
FSActionSheet *actionSheet = [[FSActionSheet alloc] initWithTitle:nil cancelButton:cancelButton destructiveButton:deleteButton otherButtons:editButton, nil];
[actionSheet showInView:self.view];