从屏幕顶部显示横幅

Question

我想创建一个回合制的比赛。当玩家收到通知player:receivedTurnEventForMatch:didBecomeActive:

时

我想显示一个从屏幕顶部滑动的横幅。 “轮到你了。玩”类似于游戏中心在玩家身份验证时显示的横幅。

我该怎么办？它应该是UIViewController还是UIAlert，还是什么？

Answer 1

这里有一个很好的例子来通知你想要什么，我希望能帮到你： https://github.com/ekurutepe/MPNotificationView 要么 https://github.com/edgurgel/CMNavBarNotificationView 要么 https://github.com/terryworona/TWMessageBarManager

Answer 2

有很多方法可以做你提到的事情。这只是其中之一。随意更改代码并阅读UIView动画，您可以自己尝试不同的东西。

-(void)myMethod {
// create UILabel and set its properties
UILabel *myLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 20, 320, 50)];
myLabel.backgroundColor = [UIColor grayColor];
NSString *myLabelText = @"Welcome back, Mike Lyman"; // showing you to use NSString for label text
myLabel.textAlignment = NSTextAlignmentCenter;
myLabel.text = myLabelText;

[self.view addSubview:myLabel]; // add UILabel to view

myLabel.frame = CGRectMake(0, -50, 320, 50); // set text label frame offscreen

// start the animation to slide UILabel into visible view
[UIView animateWithDuration:0.5 delay:0
                    options:UIViewAnimationOptionCurveLinear
                 animations:^ {
                     myLabel.frame = CGRectMake(0, 20, 320, 50);

                 }
                 completion:^(BOOL finished) {
                     // after 1 second delay, start sliding UILabel out of visible view
                     [UIView animateWithDuration:0.5 delay:1
                                         options:UIViewAnimationOptionCurveLinear
                                      animations:^ {
                                          myLabel.frame = CGRectMake(0, -50, 320, 50);

                                      }
                                      completion:^(BOOL finished) {
                                          NSLog(@"Done");
                                          [self.view removeFromSuperview]; // remove UILabel from view completely
                                      }];
                 }];
}