iOS-¶¥²¿Ìáʾ¿òÔ´Âë·ÖÏí,ÔÚ¶¥²¿µ¯³öÌáʾ¿ò

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UIWindow *_window;
// ´°¿ÚµÄ¸ß¶È
#define XWWindowHeight 20
// ¶¯»­µÄÖ´ÐÐʱ¼ä
#define XWDuration 0.5
// ´°¿ÚµÄÍ£Áôʱ¼ä
#define XWDelay 1.5
// ×ÖÌå´óС
#define XWFont [UIFont systemFontOfSize:12]

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/**
 *  ÏÔʾÐÅÏ¢
 *
 *  @param msg   ÎÄ×ÖÄÚÈÝ
 *  @param image ͼƬ¶ÔÏó
 */
+ (void)showMessage:(NSString *)msg image:(UIImage *)image
{

    if (_window) return;

    // ´´½¨°´Å¥
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];

    // ÉèÖð´Å¥ÎÄ×Ö´óС
    btn.titleLabel.font = XWFont;

    // ÇеôÎÄ×Ö×ó±ßµÄ 10
    btn.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);

    // ÉèÖÃÊý¾Ý
    [btn setTitle:msg forState:UIControlStateNormal];
    [btn setImage:image forState:UIControlStateNormal];

    // ´´½¨´°¿Ú
    _window = [[UIWindow alloc] init];
    // ´°¿Ú±³¾°
    _window.backgroundColor = [UIColor blackColor];
    _window.windowLevel = UIWindowLevelAlert;
    _window.frame = CGRectMake(0, -XWWindowHeight, [UIScreen mainScreen].bounds.size.width, XWWindowHeight);
    btn.frame = _window.bounds;
    [_window addSubview:btn];
    _window.hidden = NO;

    // ״̬À¸ Ò²ÊÇÒ»¸öwindow
    // UIWindowLevelAlert > UIWindowLevelStatusBar > UIWindowLevelNormal

    // ¶¯»­
    [UIView animateWithDuration:XWDuration animations:^{
        CGRect frame = _window.frame;
        frame.origin.y = 0;
        _window.frame = frame;
    }completion:^(BOOL finished) {
        [UIView animateWithDuration:XWDuration delay:XWDelay options:kNilOptions animations:^{
            CGRect frame = _window.frame;
            frame.origin.y = -XWWindowHeight;
            _window.frame = frame;
        } completion:^(BOOL finished) {
            _window = nil;
        }];
    }];
}