iOS开发中,如何将图片保存到相册

- (void)viewDidLoad {

[superviewDidLoad];

self.view.backgroundColor= [UIColorwhiteColor];

/*

保存图片有两种方式:

1>.按钮方式;

2>.长按图片方式;

*/

//显示图片

_imageV= [[UIImageViewalloc]initWithFrame:CGRectMake(100,100,200,200)];

//[注意🐷] : "9.jpg"这里是图片名的名字,用户更改成相应的图片名

_imageV.image= [UIImageimageNamed:@"9.jpg"];

//使用手势必须开启交互性

_imageV.userInteractionEnabled=YES;

[self.viewaddSubview:_imageV];

//方式一:给图片添加长按手势

UILongPressGestureRecognizer* longPress = [[UILongPressGestureRecognizeralloc]initWithTarget:selfaction:@selector(longPressClick:)];

//设置长按时间,默认0.5秒

longPress.minimumPressDuration=1.0;

[self.imageVaddGestureRecognizer:longPress];

//方式二:创建按钮

UIButton* btn = [UIButtonbuttonWithType:UIButtonTypeCustom];

btn.backgroundColor= [UIColoryellowColor];

[btnsetTitle:@"保存相册"forState:UIControlStateNormal];

[btnsetTitleColor:[UIColororangeColor]forState:UIControlStateNormal];

btn.frame=CGRectMake(30,70,100,30);

[self.viewaddSubview:btn];

[btnaddTarget:selfaction:@selector(btnClick:)forControlEvents:UIControlEventTouchUpInside];

}

//长按手势实现图片保存

- (void)longPressClick:(UIGestureRecognizer*)longPress{

//必须加上判断语句防止多次保存

if(longPress.state==UIGestureRecognizerStateBegan) {

UIImageWriteToSavedPhotosAlbum(self.imageV.image,self,@selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:),nil);

}

}

//按钮点击事件的实现

- (void)btnClick:(UIButton*)btn{

UIImageWriteToSavedPhotosAlbum(self.imageV.image,self,@selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:),nil);

}

//保存图片的方法

- (void)imageSavedToPhotosAlbum:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo{

if(!error) {

NSLog(@"成功图片保存到相册");

}else{

NSLog(@"%@",error.localizedDescription);

}

}

工程下载地址:  github.com/NSLog-YuHaitao/savePhoto.git