标题: iOS开发之使用UIimage+ImageEffects实现图片模糊效果 [打印本页]
作者: niujia    时间: 2015-7-18 00:33
标题: 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







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