1.设置导航栏透明 Item 不透明 同时修改适应的title文字颜色
[self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics: UIBarMetricsDefault];
[self.navigationBar setShadowImage:[UIImage new]];
self.navigationController.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName : [UIColor whiteColor]};
2.view添加渐变色
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = colorView.bounds;
gradient.colors = [NSArrayarrayWithObjects:
(id)[UIColorcolorWithRed:0green:143/255.0blue:234/255.0alpha:1.0].CGColor,
(id)[UIColorcolorWithRed:0green:173/255.0blue:234/255.0alpha:1.0].CGColor,
(id)[UIColorwhiteColor].CGColor, nil];
[self.view.layer addSublayer: gradient];
3.时间显示上午或者下午
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.AMSymbol = @"AM";
formatter.PMSymbol = @"PM";
formatter.dateFormat = @"hh:mm aaa";
NSString*dateStr = [formatter stringFromDate: date];
4.scroll delegate 判断手指移动变化
CGPoint point = [scrollView.panGestureRecognizer translationInView: self.view];
判断point变化 判断手势方向
5.tableview 刷新周期
CATransaction.begin()
CATransaction.setCompletionBlock {
self.tableView.reloadData()
}
self.tableView.beginUpdates()
self.tableView.deleteRows(at: [(NSIndexPath(row: idx, section: 0) as IndexPath)], with: .left)
self.tableView.endUpdates()
CATransaction.commit()
6.终端输入 Xceode 显示编译时长
defaults write com.apple.dt.Xcode ShowBuildOperationDuration YES
