OC調(diào)用相機并且給拍好的照片添加水印
今天我們學(xué)習(xí)一下iOS調(diào)用原生相機并且給照片添加水印要怎么做。
首先我們新建一個項目，在開始寫代碼之前我們要添加權(quán)限。找到項目的Info.plist文件，添加相機和相冊的使用權(quán)限。右鍵>Add Row 添加 "Privacy - Photo Library Usage Description" 和 "Privacy - Camera Usage Description"的key。value填寫自定義提示文字。（當(dāng)用戶第一次要使用相機和相冊的時候會彈出提示框）
1-1
Privacy - Photo Library Usage Description
Privacy - Camera Usage Description
話不多說直接貼代碼。
先導(dǎo)入頭文件
#import <Photos/Photos.h>
@interface ViewController ()<UIImagePickerControllerDelegate>
@property (strong,nonatomic) UIImagePickerController * pickerImage;
UIImagePickerController的初始化
self.pickerImage =[[UIImagePickerController alloc] init];
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;//設(shè)置類型為相機
self.pickerImage.delegate = self;//設(shè)置代理
self.pickerImage.allowsEditing = YES;//設(shè)置照片可編輯
self.pickerImage.sourceType = sourceType;
//設(shè)置是否顯示相機控制按鈕 默認為YES
self.pickerImage.showsCameraControls = YES;
//創(chuàng)建疊加層(例如添加的相框,這里通過這種方式可以在拍照的時候把水印直接顯示在相機上)
UIView *overLayView=[[UIView alloc]initWithFrame:CGRectMake(0, 60, s_width, s_height - 200)];
UILabel * telLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 300 - 200, 300, 30)];
telLbl.textColor = UIColor.whiteColor;
telLbl.text = [NSString stringWithFormat:@"手機號:%@",self.shouji.text];
[overLayView addSubview:telLbl];
UILabel * jingduLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 268 - 200, 300, 30)];
jingduLbl.text = [NSString stringWithFormat:@"經(jīng)度:%@",jingdu] ;
jingduLbl.textColor = UIColor.whiteColor;
[overLayView addSubview:jingduLbl];
UILabel * weiduLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 236 - 200, 300, 30)];
weiduLbl.text = [NSString stringWithFormat:@"緯度:%@",weidu];
weiduLbl.textColor = UIColor.whiteColor;
[overLayView addSubview:weiduLbl];
UILabel * dizhiLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 202 - 200, 400, 30)];
dizhiLbl.text = [NSString stringWithFormat:@"地址:%@",dizhi];
dizhiLbl.textColor = UIColor.whiteColor;
[overLayView addSubview:dizhiLbl];
UILabel * shijianLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 170 - 200, 300, 30)];
shijianLbl.text = [NSString stringWithFormat:@"時間:%@",currentDateStr];
shijianLbl.textColor = UIColor.whiteColor;
[overLayView addSubview:shijianLbl];
UILabel * beizhuLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 138 - 200, 300, 30)];
beizhuLbl.text = [NSString stringWithFormat:@"備注:%@",self.beizhu.text];;
beizhuLbl.textColor = UIColor.whiteColor;
[overLayView addSubview:beizhuLbl];
//選擇前置攝像頭或后置攝像頭
self.pickerImage.cameraDevice=UIImagePickerControllerCameraDeviceRear;
//調(diào)用系統(tǒng)攝像頭
[self presentViewController:self.pickerImage animated:YES completion:^{
}];
}
拍照以后通過代理方法獲取當(dāng)前得到的圖片
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
// 獲取用戶拍攝的是照片還是視頻
UIImage *theImage =nil;
// 判斷，圖片是否允許修改
if ([picker allowsEditing])
{
// 獲取用戶編輯之后的圖像
theImage = [info objectForKey:UIImagePickerControllerEditedImage];
}
else
{
// 獲取原始的照片
theImage = [info objectForKey:UIImagePickerControllerOriginalImage];
}
[self composeImg:theImage];
}
水印簡單來說就是兩張圖片何在一起，我們現(xiàn)在現(xiàn)在來通過UIView畫一張圖片，把它當(dāng)做簡單的水印，當(dāng)然大家自己有水印素材可以直接跳過這一步，用兩個UIImage對象去合成一張圖片
- (void)initLogoImage
{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
//設(shè)定時間格式,這里可以設(shè)置成自己需要的格式
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
//用[NSDate date]可以獲取系統(tǒng)當(dāng)前時間
NSString *currentDateStr = [dateFormatter stringFromDate:[NSDate date]];
//創(chuàng)建疊加層(例如添加的相框)
UIView *overLayView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, s_width, s_height - 200)];
UILabel * telLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 300 - 200, 300, 30)];
telLbl.textColor = UIColor.whiteColor;
telLbl.text = [NSString stringWithFormat:@"手機:%@",self.shouji.text];
[overLayView addSubview:telLbl];
UILabel * jingduLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 268 - 200, 300, 30)];
jingduLbl.text = [NSString stringWithFormat:@"經(jīng)度:%@",jingdu] ;
jingduLbl.textColor = UIColor.whiteColor;
[overLayView addSubview:jingduLbl];
UILabel * weiduLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 236 - 200, 300, 30)];
weiduLbl.text = [NSString stringWithFormat:@"緯度:%@",weidu];
weiduLbl.textColor = UIColor.whiteColor;
[overLayView addSubview:weiduLbl];
UILabel * dizhiLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 202 - 200, 400, 30)];
dizhiLbl.text = [NSString stringWithFormat:@"地址:%@",dizhi];
dizhiLbl.textColor = UIColor.whiteColor;
[overLayView addSubview:dizhiLbl];
UILabel * shijianLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 170 - 200, 300, 30)];
shijianLbl.text = [NSString stringWithFormat:@"時間:%@",currentDateStr];
shijianLbl.textColor = UIColor.whiteColor;
[overLayView addSubview:shijianLbl];
UILabel * beizhuLbl = [[UILabel alloc]initWithFrame:CGRectMake(40, s_height - 138 - 200, 300, 30)];
beizhuLbl.text = [NSString stringWithFormat:@"備注:%@",self.beizhu.text];
beizhuLbl.textColor = UIColor.whiteColor;
[overLayView addSubview:beizhuLbl];
overLayView.backgroundColor = [UIColor clearColor];
_logoImage = [self convertViewToImage:overLayView];
}
// 傳入UIView生成UIImage對象使用該方法不會模糊，根據(jù)屏幕密度計算
- (UIImage *)convertViewToImage:(UIView *)view {
UIImage *imageRet = [[UIImage alloc]init];
//UIGraphicsBeginImageContextWithOptions(區(qū)域大小, 是否是非透明的, 屏幕密度); 這里透明度指的是背景是否透明
UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, [UIScreen mainScreen].scale);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
imageRet = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return imageRet;
}
ConvertViewToImage的方法拿到的圖片我們把它作為水印和拍好的照片畫到一起
// 我這里方法傳進來的是主圖片 _logoImage是作為水印圖片
- (void)composeImg:(UIImage *)image{
CGFloat w = 1000;
CGFloat h = 1000;
//以主圖片的大小作為底圖
//以主圖片為畫布創(chuàng)建上下文
UIGraphicsBeginImageContext(CGSizeMake(s_width, s_height));
//先把1.png 畫到上下文中
[image drawInRect:CGRectMake(0, 0, s_width, s_height)];
//再把小圖放在上下文中 位子坐標自己慢慢調(diào)整
[_logoImage drawInRect:CGRectMake(20, 20, w, h)];
//從當(dāng)前上下文中獲得最終圖片
UIImage *resultImg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();//關(guān)閉上下文
// 預(yù)覽我們合成的照片
[self showResultPhoto:resultImg];
}
// 預(yù)覽我們得到的圖片
- (void)showResultPhoto:(UIImage *)image{
photoImage = [UIImageView new];
photoImage.image = image;
[self.view addSubview:photoImage];
photoImage.frame = self.view.frame;
saveBtn = [UIButton allloc]initWithFrame:CGRectMake(x, y, width, height)];// 保存圖片的按鈕
[saveBtn setTitle:@"使用相片" forState:UIControlStateNormal];
self.phtotImage = image;
[saveBtn addTarget:self action:@selector(saveSWPhoto) forControlEvents:UIControlEventTouchUpInside];
[saveBtn setBackgroundColor:UIColor.grayColor];
[self.view addSubview:saveBtn];
}
// 保存所得到的圖片
- (void)saveSWPhoto{
ShowHUBInController;
[[PHPhotoLibrary sharedPhotoLibrary]performChanges:^{
[PHAssetChangeRequest creationRequestForAssetFromImage:self.phtotImage];
} completionHandler:^(BOOL success, NSError * _Nullable error) {
if (error) {
dispatch_async(dispatch_get_main_queue(), ^{
HideHUBInController;;
ShowHUBInWindowAutoHid(@"保存失敗");
});
NSLog(@"%@",@"保存失敗");
NSLog(@"%@",error);
} else {
dispatch_async(dispatch_get_main_queue(), ^{
HideHUBInController;
ShowHUBInWindowAutoHid(@"保存成功");
});
NSLog(@"%@",@"保存成功");
}
}];
}
這里我們來看看軟件的截圖和拍出的照片的樣子吧
打開相機
預(yù)覽照片
保存到相冊的照片
感覺還是不錯的，嘿嘿。有什么不好的地方麻煩大家?guī)兔χ赋?，我們共同學(xué)習(xí)。
如果能幫到大家，就給我點個贊吧。謝謝大家。
