/**

*  背景模糊化效果

*/

- (void)resetBlurView

{

ANBlurredImageView *blurView = self.commentBackground; // 创建ANBlurredImageView类型的属性

blurView.baseImage = [self screenShots];

blurView.blurAmount = 0.3; // 设置透明度

__weak typeof (self) weakP = self;

BLOCK_BACKGROUND(^() {

[blurView generateBlurFramesWithCompletion:^{

BLOCK_MAIN_THREAD(^() {

[weakP showBackgroundViewAnimation:YES];

});

}];

});

}

-(UIImage *)screenShots

{

CGSize imageSize = [[UIScreen mainScreen] bounds].size;

UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);

CGContextRef context = UIGraphicsGetCurrentContext();

for (UIWindow * window in [[UIApplication sharedApplication] windows]) {

if (![window respondsToSelector:@selector(screen)] || [window screen] == [UIScreen mainScreen]) {

CGContextSaveGState(context);

CGContextTranslateCTM(context, [window center].x, [window center].y);

CGContextConcatCTM(context, [window transform]);

CGContextTranslateCTM(context, -[window bounds].size.width*[[window layer] anchorPoint].x, -[window bounds].size.height*[[window layer] anchorPoint].y);

[[window layer] renderInContext:context];

CGContextRestoreGState(context);

}

}

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return image;

}

- (void)showBackgroundViewAnimation:(BOOL)show

{

__weak typeof (self) weakP = self;

if (show) {

weakP.commentBackground.hidden = NO;

[weakP.commentBackground blurInAnimationWithDuration:self.keyboardAppear];

} else {

[weakP.commentBackground blurOutAnimationWithDuration:self.keyboardAppear completion:^{

weakP.commentBackground.hidden = YES;

}];

}

}