關於iOS 可消失的提示框(黑色)
阿新 • • 發佈:2019-01-06
首先我們需要寫一個私有方法,封裝一下,以便於後面呼叫
我們需要在.h檔案中寫一個這樣的方法
-(void)showAlertMsg:(NSString *)message Duration:(float)duration;
然後在.m檔案中呼叫
-(void)showAlertMsg:(NSString *)message Duration:(float)duration { UIWindow * window = [UIApplication sharedApplication].keyWindow; UIView *showview = [[UIView alloc]init]; showview.backgroundColor = [UIColor blackColor]; 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 = [[UILabel alloc]init]; CGSize LabelSize = [message sizeWithFont:[UIFont systemFontOfSize:17] constrainedToSize:CGSizeMake(SCREEN_WIDTH-50, 9000)]; label.frame = CGRectMake(10, 5, LabelSize.width, LabelSize.height); label.text = message; label.textColor = [UIColor whiteColor]; label.textAlignment = 1; label.backgroundColor = [UIColor clearColor]; label.font = [UIFont boldSystemFontOfSize:15]; label.numberOfLines = 0; // [showview addSubview:label]; showview.frame = CGRectMake((SCREEN_WIDTH - LabelSize.width)/2, SCREEN_HEIGHT/2 +50+LabelSize.height, LabelSize.width+10, LabelSize.height+10); [UIView animateWithDuration:duration animations:^{ showview.alpha = 0; } completion:^(BOOL finished) { [showview removeFromSuperview]; }]; }
最後在你需要的地方去呼叫此方法
[self showAlertMsg:@"你想輸入的內容" Duration:3(希望出現多少秒)];