iOS毛玻璃效果(不需要任何第三方了)
阿新 • • 發佈:2019-01-27
分享兩種毛玻璃效果設定的方法,不需要任何三方東東,先看效果:
原圖:
方法一(iOS8系統方法):
方法二:
下面是示例程式碼:
- #import "ViewController.h"
- @interface ViewController ()
- {
- UIImageView *_imageView;
- }
- @end
- @implementation ViewController
- - (void)viewDidLoad {
- [super viewDidLoad];
- _imageView = [[UIImageView alloc]initWithFrame:self
- _imageView.image = [UIImage imageNamed:@"1.jpg"];
- [self.view addSubview:_imageView];
- //方法一:系統方法,iOS8及以上可用
- if (!UIAccessibilityIsReduceTransparencyEnabled()) {
- UIBlurEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
- UIVisualEffectView
- blurEffectView.frame = _imageView.bounds;
- [_imageView addSubview:blurEffectView];
- }
- //方法二:Core Image
- UIImageView *blurImageView = [[UIImageView alloc]initWithFrame:_imageView.bounds];
- blurImageView.image
- [_imageView addSubview:blurImageView];
- }
- //生成一張毛玻璃圖片
- - (UIImage*)blur:(UIImage*)theImage
- {
- CIContext *context = [CIContext contextWithOptions:nil];
- CIImage *inputImage = [CIImage imageWithCGImage:theImage.CGImage];
- CIFilter *filter = [CIFilter filterWithName:@"CIGaussianBlur"];
- [filter setValue:inputImage forKey:kCIInputImageKey];
- [filter setValue:[NSNumber numberWithFloat:15.0f] forKey:@"inputRadius"];
- CIImage *result = [filter valueForKey:kCIOutputImageKey];
- CGImageRef cgImage = [context createCGImage:result fromRect:[inputImage extent]];
- UIImage *returnImage = [UIImage imageWithCGImage:cgImage];
- CGImageRelease(cgImage);
- return returnImage;
- }
- - (void)didReceiveMemoryWarning {
- [super didReceiveMemoryWarning];
- // Dispose of any resources that can be recreated.
- }
- @end
具體效果和引數自行研究吧!