1.UIAlertView在iOS9.0后被拋棄
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:NSLocalizedString(@"請核對后重新輸入",nil) delegate:self cancelButtonTitle:NSLocalizedString(@"知道了",nil) otherButtonTitles:nil, nil];
[alertView show];
2.UIAlertController
NSString *message = NSLocalizedString(@"請核對后重新輸入",nil);
NSString *title = @"提示";
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
//改變title的大小和顏色
NSMutableAttributedString *titleAtt = [[NSMutableAttributedString alloc] initWithString:title];
[titleAtt addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:16] range:NSMakeRange(0, title.length)];
[titleAtt addAttribute:NSForegroundColorAttributeName value:[UIColor orangeColor] range:NSMakeRange(0, title.length)];
[alertController setValue:titleAtt forKey:@"attributedTitle"];
//改變message的大小和顏色
NSMutableAttributedString *messageAtt = [[NSMutableAttributedString alloc] initWithString:message];
[messageAtt addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:13] range:NSMakeRange(0, message.length)];
[messageAtt addAttribute:NSForegroundColorAttributeName value:[UIColor darkTextColor] range:NSMakeRange(0, message.length)];
[alertController setValue:messageAtt forKey:@"attributedMessage"];
UIAlertAction *alertAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"知道了",nil) style:UIAlertActionStyleCancel handler:nil];
[alertController addAction:alertAction];
[self presentViewController:alertController animated:YES completion:nil];
注：當title設(shè)置為nil時，message的字體大小會是標題的大小，如果單純只是希望message小些司蔬，可設(shè)置title = @ "" 即可
注：UIAlertAction的字體也可改變，打印屬性即可查看。取消按鈕字體顏色的key是@"titleTextColor"
3.屬性可通過runtime打印
unsigned int count = 0;
Ivar *ivars = class_copyIvarList([UIAlertController class], &count);
for (int i = 0; i<count; i++) {
Ivar ivar = ivars[i];
NSLog(@"%s------%s", ivar_getName(ivar),ivar_getTypeEncoding(ivar));
}
