iOS 常用方法（持续更新）

//管理APP所有权限

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];

//tableview取消选中（点击方法中添加此方法）

    [self performSelector:@selector(deselect) withObject:nil afterDelay:0.25f];

//取消选中

- (void)deselect
{
    [self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];
    
}

//使用系统的复制粘贴功能

[UIPasteboard generalPasteboard].string = @"你的字符串";

//修改系统相册界面为中文

在 Info.plist 文件中添加 Localizations 键值 内容为item 值为Chinese (simplified)

//默认返回按钮去掉文字（此方法遇到特殊情况不好用，最好在界面跳转前重新定义backBarButtonItem）

[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault];

//禁止tableview滑动

self.tableview.scrollEnabled = NO;

//隐藏导航栏

[self.navigationController.navigationBar setBackgroundImage:[UIImage new]
                           forBarPosition:UIBarPositionAny
                               barMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setShadowImage:[UIImage new]];

//父视图透明子视图不透明

btn.backgroundColor = [[UIColor colorWithWhite:0.5 alpha:1] colorWithAlphaComponent:0.1];

//tableview改变头部视图背景颜色与字体颜色

#pragma mark 改变头部视图
-(void)tableView:(UITableView *)tableView willDisplayHeaderView:(UIView *)view forSection:(NSInteger)section{
    view.tintColor = ViewBGC;
    UITableViewHeaderFooterView *head = (UITableViewHeaderFooterView *)view;
    head.textLabel.textColor = RGB(62, 99, 114, 1);
}
#pragma mark 改变底部视图
- (void)tableView:(UITableView *)tableView willDisplayFooterView:(UIView *)view forSection:(NSInteger)section{
    view.tintColor = [UIColor clearColor];
}

//开启照明

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

    self.isOpen = !self.isOpen;
    
    AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    if ([device hasTorch]) {
        [device lockForConfiguration:nil];
        if (self.isOpen) {
            [device setTorchMode:AVCaptureTorchModeOn];
        } else {
            [device setTorchMode:AVCaptureTorchModeOff];
        }
        [device unlockForConfiguration];
    }
    
}

//UITableView 的 headerView跟随 cell一起滚动

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    if (scrollView == self.tableView)
    {
        if (scrollView.contentOffset.y<=SectionHeaderHeight && scrollView.contentOffset.y>=0) {
            scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, 0, 0);
        } else if (scrollView.contentOffset.y >= SectionHeaderHeight) {
            scrollView.contentInset = UIEdgeInsetsMake(-SectionHeaderHeight, 0, 0, 0);
        }
    }
}

获取APP的图标 icon

    NSDictionary *infoPlist = [[NSBundle mainBundle] infoDictionary];

    NSString *icon = [[infoPlist valueForKeyPath:@"CFBundleIcons.CFBundlePrimaryIcon.CFBundleIconFiles"] lastObject];

    UIImage* image = [UIImage imageNamed:icon];