iOS UIView、UIImage、NSData转换

最新推荐文章于 2021-08-17 17:45:50 发布

原创最新推荐文章于 2021-08-17 17:45:50 发布 · 2k 阅读

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本文介绍如何将UIView转换为UIImage，UIImage保存为NSData的方法，并演示了如何使用NSJSONSerialization进行NSDictionary与NSData之间的互相转换。

1. UIView -> UIImage

-(UIImage *)getImageFromView:(UIView *)view{
    UIGraphicsBeginImageContext(view.bounds.size);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

2. UIImage -> NSData

NSData *data = UIImagePNGRepresentation(image);

3. NSDictionary <-> NSData

NSDictionary *dic = @{@"name":@"macRong",@"webHome":@"eqi.cc"};
NSData *data =    [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:nil];
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];