头像点击查看大图和保存功能实现(保存的细节处理)-白红宇

头像点击查看大图和保存功能实现

分类处理,百行代码.(提示的文本控件,替换为当前项目的HUB即可),方便使用.

点击查看他人头像

点击后呈现,系统动画渐变过度

点击图片或者背景,渐变消失

保存头像图片的处理

当前用户已给予访问权限,直接保存.

当前用户未给予访问权限,告知暂无权限访问您的相册.

当前用户第一次,系统级别的对话框弹出,用户点击不,则不保存,点击了允许,则保存照片,不需要用户给予权限后再次点击保存.

how to user

Swift:avatarImageView = UIImageView()avatarImageView.LFLHeadimageBrowser() Objective-C:avatarImageView = [UIImageView new];[avatarImageView LFLHeadimageBrowser];复制代码

点击查看大图部分

#import "UIImageView+LFLHelper.h"#import 
    
     #define LFLANIMATEDURATION 0.3static CGRect originFrame;@implementation UIImageView (LFLHelper)- (void)LFLHeadimageBrowser{    self.userInteractionEnabled = YES;    [self addGestureRecognizer:[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapHeadimageHandle)]];}- (void)tapHeadimageHandle{    UIWindow *window = [UIApplication sharedApplication].keyWindow;    UIView *backgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];    originFrame = [self convertRect:self.bounds toView:window];    NSLog(@"oldframe%@",NSStringFromCGRect(originFrame));    backgroundView.backgroundColor =[UIColor blackColor];    UIImageView *imageView = [[UIImageView alloc] initWithFrame:originFrame];    imageView.tag = 1111;    [imageView setImage:self.image];    UIButton *saveButton = [[UIButton alloc] init];    [saveButton setTitle:@"保存" forState:UIControlStateNormal];    [saveButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];    saveButton.backgroundColor = [UIColor colorWithRed:0.1f green:0.1f blue:0.1f alpha:0.90f];    saveButton.layer.cornerRadius = 5;    saveButton.titleLabel.font = [UIFont systemFontOfSize:16.0];    saveButton.clipsToBounds = YES;    saveButton.frame = CGRectMake([UIScreen mainScreen].bounds.size.width/2 - 25, [UIScreen mainScreen].bounds.size.height - 60, 50, 25);    [saveButton addGestureRecognizer:[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(saveCurrentImageClick)]];    [backgroundView addSubview:saveButton];    [backgroundView addSubview:imageView];    [window addSubview:backgroundView];    [backgroundView addGestureRecognizer:[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(dismissAction:)]];    //  view big  eadimageBrowser    [UIView animateWithDuration:LFLANIMATEDURATION animations:^{        CGFloat y,width,height;        y = ([UIScreen mainScreen].bounds.size.height - self.image.size.height * [UIScreen mainScreen].bounds.size.width / self.image.size.width) * 0.5;        width = [UIScreen mainScreen].bounds.size.width;        height = self.image.size.height * [UIScreen mainScreen].bounds.size.width / self.image.size.width;        [imageView setFrame:CGRectMake(0, y, width, height)];    } completion:nil];}- (void)dismissAction:(UITapGestureRecognizer *)tapRecognizer{    UIView *backgroundView= tapRecognizer.view;    [UIView animateWithDuration:LFLANIMATEDURATION animations:^{        [[backgroundView viewWithTag:1111] setFrame:originFrame];    } completion:^(BOOL finished) {        [backgroundView removeFromSuperview];    }];}复制代码

保存图片

如果针对第三种情况再写保存代码有重复,所以我采取了递归处理,避免了重复代码的出现,考虑到实际情况(因为系统框询问只弹出一次),递归一次就终结.

- (void)saveCurrentImageClick{    __weak typeof(self) weakSelf = self;    [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{        PHAssetChangeRequest *req = [PHAssetChangeRequest creationRequestForAssetFromImage:weakSelf.image];        req = nil;    } completionHandler:^(BOOL success, NSError * _Nullable error) {        dispatch_async(dispatch_get_main_queue(), ^{            // tips message            UIWindow *window = [UIApplication sharedApplication].keyWindow;            UILabel *tipsLabel = [[UILabel alloc] init];            tipsLabel.textColor = [UIColor whiteColor];            tipsLabel.backgroundColor = [UIColor colorWithRed:0.1f green:0.1f blue:0.1f alpha:0.90f];            tipsLabel.layer.cornerRadius = 5;            tipsLabel.clipsToBounds = YES;            tipsLabel.bounds = CGRectMake(0, 0, 200, 30);            tipsLabel.center = window.center;            tipsLabel.textAlignment = NSTextAlignmentCenter;            tipsLabel.font = [UIFont boldSystemFontOfSize:17];            [window addSubview:tipsLabel];            [window bringSubviewToFront:tipsLabel];            if (success) {                tipsLabel.text = @"保存成功!";            }else{                if ([PHPhotoLibrary authorizationStatus] == PHAuthorizationStatusAuthorized) {                    tipsLabel.text = @"保存成功!";                }else{                // 处理第三种情况,监听用户第一次授权情况                          if ([PHPhotoLibrary authorizationStatus] == PHAuthorizationStatusNotDetermined) {                        [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {                            if (status == PHAuthorizationStatusAuthorized) {                            // 递归处理一次 , 因为系统框只弹出这一次                                [weakSelf saveCurrentImageClick];                                return ;                            }                        }];                    }else{                        tipsLabel.text = @"暂无权限访问您的相册!";                    }                }            }            [tipsLabel performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:1.0];        });    }];}复制代码