//彈出actionsheet宦赠。選擇獲取頭像的方式 //從相冊獲取圖片
-(void)takePictureClick:(UIButton *)sender { // /*注:使用,需要實(shí)現(xiàn)以下協(xié)議:UIImagePickerControllerDelegate, // UINavigationControllerDelegate // */ // UIImagePickerController *picker = [[UIImagePickerController alloc]init]; // //設(shè)置圖片源(相簿) // picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; // //設(shè)置代理 // picker.delegate = self; // //設(shè)置可以編輯 // picker.allowsEditing = YES; // //打開拾取器界面 // [self presentViewController:picker animated:YES completion:nil]; UIActionSheet* actionSheet = [[UIActionSheet alloc] initWithTitle:@"請選擇文件來源" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"照相機(jī)",@"攝像機(jī)",@"本地相簿",@"本地視頻",nil]; [actionSheet showInView:self.view]; } #pragma mark - #pragma UIActionSheet Delegate - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { NSLog(@"buttonIndex = [%d]",buttonIndex); switch (buttonIndex) { case 0://照相機(jī) { UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; imagePicker.delegate = self; imagePicker.allowsEditing = YES; imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; // [self presentModalViewController:imagePicker animated:YES]; [self presentViewController:imagePicker animated:YES completion:nil]; } break; case 1://攝像機(jī) { UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; imagePicker.delegate = self; imagePicker.allowsEditing = YES; imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; imagePicker.videoQuality = UIImagePickerControllerQualityTypeLow; // [self presentModalViewController:imagePicker animated:YES]; [self presentViewController:imagePicker animated:YES completion:nil]; } break; case 2://本地相簿 { UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; imagePicker.delegate = self; imagePicker.allowsEditing = YES; imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; // [self presentModalViewController:imagePicker animated:YES]; [self presentViewController:imagePicker animated:YES completion:nil]; } break; case 3://本地視頻 { UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; imagePicker.delegate = self; imagePicker.allowsEditing = YES; imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; // [self presentModalViewController:imagePicker animated:YES]; [self presentViewController:imagePicker animated:YES completion:nil]; } break; default: break; } } #pragma mark - #pragma UIImagePickerController Delegate - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { if ([[info objectForKey:UIImagePickerControllerMediaType] isEqualToString:(__bridge NSString *)kUTTypeImage]) { UIImage *img = [info objectForKey:UIImagePickerControllerEditedImage]; [self performSelector:@selector(saveImage:) withObject:img afterDelay:0.5]; } else if ([[info objectForKey:UIImagePickerControllerMediaType] isEqualToString:(__bridge NSString *)kUTTypeMovie]) { NSString *videoPath = [[info objectForKey:UIImagePickerControllerMediaURL] path]; self.fileData = [NSData dataWithContentsOfFile:videoPath]; } // [picker dismissModalViewControllerAnimated:YES]; [picker dismissViewControllerAnimated:YES completion:nil]; } - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { // [picker dismissModalViewControllerAnimated:YES]; [picker dismissViewControllerAnimated:YES completion:nil]; } - (void)saveImage:(UIImage *)image { // NSLog(@"保存頭像米母!"); // [userPhotoButton setImage:image forState:UIControlStateNormal]; BOOL success; NSFileManager *fileManager = [NSFileManager defaultManager]; NSError *error; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *imageFilePath = [documentsDirectory stringByAppendingPathComponent:@"selfPhoto.jpg"]; NSLog(@"imageFile->>%@",imageFilePath); success = [fileManager fileExistsAtPath:imageFilePath]; if(success) { success = [fileManager removeItemAtPath:imageFilePath error:&error]; } // UIImage *smallImage=[self scaleFromImage:image toSize:CGSizeMake(80.0f, 80.0f)];//將圖片尺寸改為80*80 UIImage *smallImage = [self thumbnailWithImageWithoutScale:image size:CGSizeMake(93, 93)]; [UIImageJPEGRepresentation(smallImage, 1.0f) writeToFile:imageFilePath atomically:YES];//寫入文件 UIImage *selfPhoto = [UIImage imageWithContentsOfFile:imageFilePath];//讀取圖片文件 // [userPhotoButton setImage:selfPhoto forState:UIControlStateNormal]; self.img.image = selfPhoto; } // 改變圖像的尺寸勾扭,方便上傳服務(wù)器 - (UIImage *) scaleFromImage: (UIImage *) image toSize: (CGSize) size { UIGraphicsBeginImageContext(size); [image drawInRect:CGRectMake(0, 0, size.width, size.height)]; UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return newImage; }<div class="save_code tracking-ad" style="display: none;" data-mod="popu_249"><a target=_blank href="javascript:;" target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div>
2.保持原始圖片的長寬比,生成需要尺寸的圖片
//2.保持原來的長寬比铁瞒,生成一個縮略圖 - (UIImage *)thumbnailWithImageWithoutScale:(UIImage *)image size:(CGSize)asize { UIImage *newimage; if (nil == image) { newimage = nil; } else{ CGSize oldsize = image.size; CGRect rect; if (asize.width/asize.height > oldsize.width/oldsize.height) { rect.size.width = asize.height*oldsize.width/oldsize.height; rect.size.height = asize.height; rect.origin.x = (asize.width - rect.size.width)/2; rect.origin.y = 0; } else{ rect.size.width = asize.width; rect.size.height = asize.width*oldsize.height/oldsize.width; rect.origin.x = 0; rect.origin.y = (asize.height - rect.size.height)/2; } UIGraphicsBeginImageContext(asize); CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetFillColorWithColor(context, [[UIColor clearColor] CGColor]); UIRectFill(CGRectMake(0, 0, asize.width, asize.height));//clear background [image drawInRect:rect]; newimage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); } return newimage; }<div class="save_code tracking-ad" style="display: none;" data-mod="popu_249"><a target=_blank href="javascript:;" target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div>
3.顯示圓形頭像
```objc
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *imageFilePath = [documentsDirectory stringByAppendingPathComponent:@"selfPhoto.jpg"]; NSLog(@"imageFile->>%@",imageFilePath); UIImage *selfPhoto = [UIImage imageWithContentsOfFile:imageFilePath];// self.img.image = selfPhoto; [self.img.layer setCornerRadius:CGRectGetHeight([self.img bounds]) / 2]; //修改半徑妙色,實(shí)現(xiàn)頭像的圓形化 self.img.layer.masksToBounds = YES;
```