UIImage与字符串互转
//图片转字符串
-(NSString *)UIImageToBase64Str:(UIImage *) image{
NSData *data = UIImageJPEGRepresentation(image, 1.0f);
NSString *encodedImageStr = [data
base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
return encodedImageStr;
}
//字符串转图片
-(UIImage *)Base64StrToUIImage:(NSString *)_encodedImageStr{
NSData *_decodedImageData = [[NSData alloc]
initWithBase64Encoding:_encodedImageStr];
UIImage *_decodedImage = [UIImage imageWithData:_decodedImageData];
return _decodedImage;
}
截图
// 1. 开启一个与图片相关的图形上下文
UIGraphicsBeginImageContextWithOptions(self.view.bounds.size,NO,0.0);
// 2. 获取当前图形上下文
CGContextRef ctx = UIGraphicsGetCurrentContext();
// 3. 获取需要截取的view的layer
[self.view.layer renderInContext:ctx];
// 4. 从当前上下文中获取图片
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
// 5. 关闭图形上下文
UIGraphicsEndImageContext();
// 6. 把图片保存到相册
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
这样可以通过把图片转换为字符串传输。。。。
