在iOS中实现类似安卓自动消失提示框

+(void)showMessage:(NSString*)message

{

    UIWindow* window = [UIApplicationsharedApplication].keyWindow;

    UIView*showview =  [[UIViewalloc]init];

    showview.backgroundColor = [UIColorblackColor];

    showview.frame = CGRectMake(1, 1, 1, 1);

    showview.alpha = 1.0f;

    showview.layer.cornerRadius = 5.0f;

    showview.layer.masksToBounds = YES;

    [window addSubview:showview];

     

    UILabel*label = [[UILabelalloc]init];

    CGSize LabelSize = [message sizeWithFont:[UIFontsystemFontOfSize:17] constrainedToSize:CGSizeMake(290, 9000)];

    label.frame = CGRectMake(10, 5, LabelSize.width, LabelSize.height);

    label.text = message;

    label.textColor = [UIColorwhiteColor];

    label.textAlignment = 1;

    label.backgroundColor = [UIColorclearColor];

    label.font = [UIFontboldSystemFontOfSize:15];

    [showview addSubview:label];

    showview.frame = CGRectMake((SCREEN_WIDTH - LabelSize.width - 20)/2, SCREEN_HEIGHT - 100, LabelSize.width+20, LabelSize.height+10);

    [UIViewanimateWithDuration:1.5 animations:^{

        showview.alpha = 0;

    } completion:^(BOOLfinished) {

        [showview removeFromSuperview];

    }];

}







原文地址：http://www.oschina.net/code/snippet_1771722_44835