有的時候我們在開發(fā)過程中為了增加些視覺效果,提高用戶與界面的溝通,我們想把背景圖片加一點特效.所以就可以用到毛玻璃特效

代碼如下

//創(chuàng)建背景圖片

UIImageView*vibrancyImageView = [[UIImageViewalloc]initWithFrame:CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height)];

UIImage*image2 = [UIImageimageNamed:@"6_1.jpg"];

[image2imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];

vibrancyImageView.image= image2;

[self.viewaddSubview:vibrancyImageView];

[vibrancyImageViewrelease];

//創(chuàng)建UILabel

UILabel*viLabel = [[UILabelalloc]initWithFrame:CGRectMake(30,200,self.view.frame.size.width-60,200)];

viLabel.text=@"生活不止眼前的茍且";

viLabel.font= [UIFontsystemFontOfSize:30];

/**創(chuàng)建UIBlurEffect類的對象*/

UIBlurEffect*blu = [UIBlurEffecteffectWithStyle:UIBlurEffectStyleLight];

/**創(chuàng)建UIVibrancyEffect類的對象*/

UIVibrancyEffect*vibrancy = [UIVibrancyEffecteffectForBlurEffect:blu];

/**創(chuàng)建UIVisuaIEffectView類的對象,并以vibrancy為參數(shù)*/

UIVisualEffectView*visual = [[UIVisualEffectViewalloc]initWithEffect:vibrancy];

/*毛玻璃的效果*/

visual.frame=CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height);

/*設(shè)置透明度.(越趨近于零的時候文字效果越不明顯)*/

visual.alpha=1;

/*將文字賦到毛玻璃視覺效果上*/

[visual.contentViewaddSubview:viLabel];

/*將毛玻璃效果賦到背景圖片上*/

[vibrancyImageViewaddSubview:visual];

[visualrelease];