iOS-Development-Tips-1

清除UITableView底部多余的分割线

self.tableView.tableFooterView = [[UIView alloc] init];

tableview 设置 cell 间的分割线长度

_myTableView.separatorInset = UIEdgeInsetsMake(0, 3, 0, 11);

把tableview里cell的小对勾的颜色改成别的颜色

_mTableView.tintColor = [UIColor redColor];

tableview里cell右侧小箭头

cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
//剪头前面添加文字
cell.detailTextLabel.text = @"mona";

计算ScrollView contentSize的通用方法

CGRect contentRect = CGRectZero;
for (UIView *view in scrollView.subviews){
    contentRect = CGRectUnion(contentRect, view.frame);
}
scrollView.contentSize = contentRect.size;

手势共存

// 单击的 Recognizer
UITapGestureRecognizer *singleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:selfaction:@selector(handleSingleTapFrom)];
singleRecognizer.numberOfTapsRequired = 1; // 单击
[self.view addGestureRecognizer:singleRecognizer];

// 双击的 Recognizer
UITapGestureRecognizer* doubleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:selfaction:@selector(handleDoubleTapFrom)];
doubleRecognizer.numberOfTapsRequired = 2; // 双击
[self.view addGestureRecognizer:doubleRecognizer];

// 关键在这一行，如果双击确定偵測失败才會触发单击
[singleRecognizer requireGestureRecognizerToFail:doubleRecognizer];

imageNamed的内存问题

NSString *path = [[NSBundle mainBundle] pathForResource:@”icon” ofType:@”png”];
myImage = [UIImage imageWithContentsOfFile:path];

用户输入的情况下键盘事件处理繁琐

点击任意位置收起键盘

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
   [self.view endEditing:YES];
}

像safari一样滑动的时候隐藏navigationbar

navigationController.hidesBarsOnSwipe = Yes

导航条返回键带的title太讨厌了,怎么让它消失

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

设置导航条title颜色

NSDictionary *navbarTitleTextAttributes = [NSDictionary dictionaryWithObjectsAndKeys: [UIColor whiteColor],UITextAttributeTextColor, [UIColor blackColor], UITextAttributeTextShadowColor, [UIFont fontWithName:CHINESE_FONT_NAME size:20.0f],UITextAttributeFont, [NSValue valueWithUIOffset:UIOffsetMake(-1, 0)], UITextAttributeTextShadowOffset, nil];

// 修改单个
[self.navigationController.navigationBar setTitleTextAttributes:navbarTitleTextAttributes];

//修改全局
[[UINavigationBar appearance] setTitleTextAttributes:navbarTitleTextAttributes];

CollectionView 实现tableview那种悬停的header

参考