iOS开发之使用UIimage+ImageEffects实现图片模糊效果

效果图


代码

//

//  ViewController.m

//  UImage+ImageEffects-Demo

//

//  Created by 寒竹子 on 15/6/14.

//  Copyright (c) 2015年 寒竹子. All rights reserved.

//

#import "ViewController.h"

#import "GCD.h"

#import "UIImage+ImageEffects.h"

@interface ViewController ()

@property (nonatomic, strong) UIImageView * imageView;

@property (nonatomic)         UIViewContentMode contentMode; // 图片显示的模式

@end

@implementation ViewController

- (instancetype)init

{

    if (self = [super init]) {

        // Initial code

    }

    return self;

}

@synthesize contentMode = _contentMode;

#pragma mark - getter and setter

- (void)setContentMode:(UIViewContentMode)contentMode

{

    _contentMode = contentMode;

    self.imageView.contentMode = contentMode;

}

- (UIViewContentMode)contentMode

{

    return _contentMode;

}

- (void)viewDidLoad {

    [super viewDidLoad];

    self.view.backgroundColor = [UIColor whiteColor];

    self.imageView          = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];

    self.imageView.alpha    = .0f;

    self.imageView.center   = self.view.center;

    self.contentMode        = UIViewContentModeScaleAspectFill;

    [self.view addSubview:self.imageView];

    // 异步下载图片

    [GCDQueue executeInGlobalQueue:^{

        NSString * imageURL       = @"/uploadfile/2014/1229/20141229033638152.jpg";

        NSURLRequest * urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:imageURL]];

        // 下载图片

        NSData * imageData        = [NSURLConnection sendSynchronousRequest:urlRequest returningResponse:nil error:nil];

        UIImage * image           = [UIImage imageWithData:imageData];

        // 模糊图片  并设置模糊程度

        UIImage * blurImage       = [image blurImageWithRadius:10.0f];

        // 主线程 更新UI

        [GCDQueue executeInMainQueue:^{

            self.imageView.image     = blurImage;

            [UIView animateWithDuration:1.0f animations:^{

                self.imageView.alpha = 1.0f;

            } completion:nil];

        }];

    }];

}

@end