1.给UITableViewCell添加滚动动画
主要实现tableview的下面代理方法，设置cell的transform属性
#define ScreenW [UIScreen mainScreen].bounds.size.width
-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
cell.transform = CGAffineTransformTranslate(cell.transform, ScreenW/2, 0);
[tableView bringSubviewToFront:cell];
[UIView animateWithDuration:.5f
delay:0
options:UIViewAnimationOptionAllowUserInteraction
animations:^{
cell.transform = CGAffineTransformIdentity;
} completion:nil];
}
2.给视图添加视觉偏移效果
主要实现类似手机桌面偏移效果
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];
view.backgroundColor = [UIColor grayColor];
[self addSubview:view];
UIInterpolatingMotionEffect *motionEffect;
motionEffect = [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.x" type:UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis];
motionEffect.minimumRelativeValue = @(-25);
motionEffect.maximumRelativeValue = @(25);
[view addMotionEffect:motionEffect];
motionEffect = [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.y" type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis];
motionEffect.minimumRelativeValue = @(-25);
motionEffect.maximumRelativeValue = @(25);
[view addMotionEffect:motionEffect];
3.后台运行进行数据的保存
如果你的应用在home键退出到后台时希望保存数据或进行一些处理，那么为了延长应用在后台的运行时间你可以用UIApplication 的 beginBackgroundTaskWithExpirationHandler 方法,让应用最多有 10 分钟的时间在后台运行。具体使用方法：
//AppDelegate.h
@property (assign, nonatomic) UIBackgroundTaskIdentifier backgroundUpdateTask;
//AppDelegate.m
- (void)applicationDidEnterBackground:(UIApplication *)application {
[self beginBackgroundUpdateTask];
//添加需要后台长久运行的代码
//TODO...
[self endBackgroundUpdateTask];
}
- (void)beginBackgroundUpdateTask{
self.backgroundUpdateTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
[self endBackgroundUpdateTask];
}];
}
- (void)endBackgroundUpdateTask{
[[UIApplication sharedApplication] endBackgroundTask:self.backgroundUpdateTask];
self.backgroundUpdateTask = UIBackgroundTaskInvalid;
}
4.设备播放短音频和震动
具体使用方法：
// 播放声音
- (SystemSoundID)playSound
{
// 要播放的音频文件地址
NSURL *bundlePath = [[NSBundle mainBundle] URLForResource:@"MyTest" withExtension:@"bundle"];
NSURL *audioPath = [[NSBundle bundleWithURL:bundlePath] URLForResource:@"in" withExtension:@"caf"];
// 创建系统声音，同时返回一个ID
SystemSoundID soundID;
AudioServicesCreateSystemSoundID((__bridge CFURLRef)(audioPath), &soundID);
// Register the sound completion callback.
AudioServicesAddSystemSoundCompletion(soundID,
NULL, // uses the main run loop
NULL, // uses kCFRunLoopDefaultMode
EMSystemSoundFinishedPlayingCallback, // the name of our custom callback function
NULL // for user data, but we don't need to do that in this case, so we just pass NULL
);
AudioServicesPlaySystemSound(soundID);
return soundID;
}
// 震动
- (void)playVibration
{
// Register the sound completion callback.
AudioServicesAddSystemSoundCompletion(kSystemSoundID_Vibrate,
NULL, // uses the main run loop
NULL, // uses kCFRunLoopDefaultMode
EMSystemSoundFinishedPlayingCallback, // the name of our custom callback function
NULL // for user data, but we don't need to do that in this case, so we just pass NULL
);
AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
}
5.
//tableView cell 中的输入框被键盘挡住 最快捷方法
- (UITableView *)tableView
{
if (!_tableView) {
_tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
_tableView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
UITableViewController *tvc = [[UITableViewController alloc] initWithStyle:UITableViewStyleGrouped];
[self addChildViewController:tvc];
_tableView = tvc.tableView;
//添加以上3行代码 即可
_tableView.delegate = self;
_tableView.dataSource = self;
_tableView.separatorColor = [UIColor yqwLineColor];
_tableView.backgroundColor = [UIColor yqwBackgroundColor];
_tableView.estimatedRowHeight = 0;
_tableView.estimatedSectionHeaderHeight = 0;
_tableView.estimatedSectionFooterHeight = 0;
[_tableView registerClass:[QMProduceAmountInfoCell class] forCellReuseIdentifier:kInfoCellIdentifier];
[_tableView registerClass:[QMPayMethodCell class] forCellReuseIdentifier:kPayCellIdentifier];
}
return _tableView;
}
6.自定义抛出异常
- (instancetype)init
{
//方法一
@throw [NSException exceptionWithName:@"init error" reason:@"please use shareInstance instead of init" userInfo:nil];
//方法二
NSException *except = [NSException exceptionWithName:@"init error" reason:@"please use shareInstance instead of init" userInfo:nil];
[except raise];
return [super init];
}
7.实时修改状态栏颜色
//1.在需要改变的地方调用，比如
#pragma mark - ScrollView delegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
_offsetY = scrollView.contentOffset.y;
[self setNeedsStatusBarAppearanceUpdate];
}
//2.UIViewController实现下面方法
#pragma mark - preferredStatusBarStyle
- (UIStatusBarStyle)preferredStatusBarStyle {
if(_offsetY>kNavigation_Bar_Height){
return UIStatusBarStyleDefault;
}
return UIStatusBarStyleLightContent;
}
8.tableView reloadSections抖动的问题
解决
方法 一：[UIView performWithoutAnimation:^{
[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationNone];
}];
方法 二：self.tableView.estimatedRowHeight = 0;
9.textView 添加链接并改变链接颜色
NSString *text = @"我同意";
NSString *rule = @"《用户注册协议》";
NSString *totalStr = [NSString stringWithFormat:@"%@%@",text,rule];
_attrStr = [[NSMutableAttributedString alloc] initWithString:totalStr];
//这样添加无效
// [_attrStr addAttribute:NSForegroundColorAttributeName value:UIColor.redColor range:NSMakeRange(text.length, rule.length)];
[_attrStr addAttributes:@{NSLinkAttributeName:[NSURL URLWithString:@""]} range:NSMakeRange(text.length, rule.length)];
_textView.attributedText = _attrStr;
//指定链接颜色
_textView.linkTextAttributes = @{NSForegroundColorAttributeName:[UIColor redColor]};