iOS _ 图片保存到本地相册

最新推荐文章于 2021-01-14 00:54:26 发布

原创最新推荐文章于 2021-01-14 00:54:26 发布 · 678 阅读

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#ios #图片 #uiimageview

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本文介绍了一个iOS应用中如何使用UIImageView+WebCache进行图片缓存，并实现将图片保存到本地的功能。文中通过一个简单的ViewController实例展示了如何加载网络图片并将其显示在UIImageView上，同时还提供了一个按钮用于触发图片保存到相册的动作。


#import "ViewController.h"
#import "UIImageView+WebCache.h"

@interface ViewController ()

@property (nonatomic, strong) UIImageView *imageV;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    [self addSubVIews];
}

- (void)addSubVIews
{
    self.imageV = [[UIImageView alloc] initWithFrame:(CGRectMake(100, 100, 200, 100))];
    [self.imageV sd_setImageWithURL:[NSURL URLWithString:@"http://ac-YML68WwP.clouddn.com/T1kBOXK1jcegpCbxPnlvEeA.jpg"]];
    [self.view addSubview:self.imageV];

    UIButton *button=[[UIButton alloc]init];
    button.frame= CGRectMake(100,300, 100,40);
    [button addTarget:self action:@selector(actionClick:)forControlEvents:UIControlEventTouchUpInside];
    [button setTitleColor:[UIColor blueColor]forState:UIControlStateNormal];
    [button setBackgroundColor:[UIColor orangeColor]];
    [button setTitle:@"保存图片"forState:UIControlStateNormal];
    [self.view addSubview:button];

}

-(void)actionClick:(UIButton*)button
{
    UIImageWriteToSavedPhotosAlbum(self.imageV.image,self,@selector(image:didFinishSavingWithError:contextInfo:),NULL);

}

//指定回调方法
-(void)image:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo
{
    if(!error){
        NSLog(@"保存成功");
    }else{
        NSLog(@"保存失败");
    }
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end