IOS为文字和图片添加阴影效果

//添加阴影

UIimageView *imageView = [[UIImageView alloc ] init];

imageView.layer.shadowColor = [UIColor blackColor].CGColor;

imageView.layer.shadowOffset = CGSizeMake(3,2);

imageView.layer.shadowOpacity = 0.6;

imageView.layer.shadowRadius = 1.0;

imageView.clipsToBounds = NO;

//文字描边

只设置shadowColor，不设置shadowOffset就可以实现描边效果