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.

#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 = @"http://www.huabian.com/uploadfile/2014/1229/20141229033638152.jpg";

NSURLRequest * urlRequest = [NSURLRequest requestWithURL:[NSURLURLWithString: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