ios UI实现技巧

1. statusBar 移动位置

   NSString *key = [[NSString alloc] initWithData:[NSData dataWithBytes:(unsigned char []){0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x42, 0x61, 0x72} length:] encoding:NSASCIIStringEncoding];
   　　key = @"statusBar";//一样的效果
      id object = [UIApplication sharedApplication];
      UIView *statusBar;
      if ([object respondsToSelector:NSSelectorFromString(key)]) {
          statusBar = [object valueForKey:key];
      }
      statusBar.transform = CGAffineTransformMakeTranslation(self.paneView.frame.origin.x, self.paneView.frame.origin.y);

2. tabBar 自定义的图标

   if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
                       UIImage *icon = [[UIImage imageNamed:@"jinghua-selected"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
                       UIImage *unIcon = [[UIImage imageNamed:@"jinghua"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
                       [nc.tabBarItem setFinishedSelectedImage:icon withFinishedUnselectedImage:unIcon];
                   } else {
                       [nc.tabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"jinghua-selected"] withFinishedUnselectedImage:[UIImage imageNamed:@"jinghua"]];
                   }
                   [nc.tabBarItem setTitle:NSLocalizedString(@"精华", nil)];

3. tabBarItem 自定义颜色

   [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                          [UIColor colorWithWhite:./ alpha:], UITextAttributeTextColor, nil]
                                                forState:UIControlStateNormal];
   
       //Item选中状态颜色
       [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                          [UIColor colorWithWhite:./ alpha:], UITextAttributeTextColor, nil]
                                                forState:UIControlStateSelected];

4. 扩展点击区域

   #import <objc/runtime.h>
   @implementation UIControl (userInteractoinEdgeInsets)
   static char topNameKey;
   static char rightNameKey;
   static char bottomNameKey;
   static char leftNameKey;
   
   -(void)setUserInteractionEdgeInsets:(UIEdgeInsets)edgeInsets{
       objc_setAssociatedObject(self, &topNameKey, [NSNumber numberWithFloat:edgeInsets.top], OBJC_ASSOCIATION_COPY_NONATOMIC);
       objc_setAssociatedObject(self, &rightNameKey, [NSNumber numberWithFloat:edgeInsets.right], OBJC_ASSOCIATION_COPY_NONATOMIC);
       objc_setAssociatedObject(self, &bottomNameKey, [NSNumber numberWithFloat:edgeInsets.bottom], OBJC_ASSOCIATION_COPY_NONATOMIC);
       objc_setAssociatedObject(self, &leftNameKey, [NSNumber numberWithFloat:edgeInsets.left], OBJC_ASSOCIATION_COPY_NONATOMIC);
   }
   
   - (CGRect)enlargedRect
   {
       NSNumber* topEdge = objc_getAssociatedObject(self, &topNameKey);
       NSNumber* rightEdge = objc_getAssociatedObject(self, &rightNameKey);
       NSNumber* bottomEdge = objc_getAssociatedObject(self, &bottomNameKey);
       NSNumber* leftEdge = objc_getAssociatedObject(self, &leftNameKey);
       if (topEdge && rightEdge && bottomEdge && leftEdge)
       {
           return CGRectMake(self.bounds.origin.x - leftEdge.floatValue,
                             self.bounds.origin.y - topEdge.floatValue,
                             self.bounds.size.width + leftEdge.floatValue + rightEdge.floatValue,
                             self.bounds.size.height + topEdge.floatValue + bottomEdge.floatValue);
       }
       else
       {
           return self.bounds;
       }
   }
   
   - (UIView*)hitTest:(CGPoint) point withEvent:(UIEvent*) event
   {
       CGRect rect = [self enlargedRect];
       if (CGRectEqualToRect(rect, self.bounds))
       {
           return [super hitTest:point withEvent:event];
       }
       return CGRectContainsPoint(rect, point) ? self : nil;
   }
   
   @end

5. tabBarController 动态添加删除

   @implementation UITabBarController (dynamic)
   -(void)deleteChildViewController:(UIViewController*)controller{
       if ([self.viewControllers containsObject:controller]){
           NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:self.viewControllers];
           [viewControllers removeObject:controller];
           self.viewControllers = [NSArray arrayWithArray:viewControllers];
       }
   }
   
   -(void)insertChildViewController:(UIViewController*)controller atIndex:(NSInteger)index{
       if (index >= && index <=self.viewControllers.count && ![self.viewControllers containsObject:controller]) {
           NSMutableArray *viewControllers = [NSMutableArray arrayWithArray:self.viewControllers];
           if (!viewControllers) {
               viewControllers = [NSMutableArray array];
           }
           [viewControllers insertObject:controller atIndex:index];
           self.viewControllers = [NSArray arrayWithArray:viewControllers];
       }
   }
   @end

6. navigationBar 自定义

   [[UINavigationBar appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys: [UIColor whiteColor], UITextAttributeTextColor, nil]];
   
       if ([[UIDevice currentDevice].systemVersion floatValue]<7.0) {
           [self.navigationBar setTintColor:[UIColor colorWithRed:0.0 green:./ blue:./ alpha:]];
       }else{
           [self.navigationBar setBarTintColor:[UIColor colorWithRed:0.0 green:./ blue:./ alpha:]];
       }

7. 本地语言修改

   [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:language, nil]
                                                 forKey:@"AppleLanguages"];
   
       [[NSUserDefaults standardUserDefaults] synchronize];

8. UITableView控制表格线

   -(void)viewDidLayoutSubviews
   {
       if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)]) {
           [self.tableView setSeparatorInset:UIEdgeInsetsMake(0,0,0,0)];
       }
   
       if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)]) {
           [self.tableView setLayoutMargins:UIEdgeInsetsMake(0,0,0,0)];
       }
   }
   
   -(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
   {
       if ([cell respondsToSelector:@selector(setSeparatorInset:)]) {
           [cell setSeparatorInset:UIEdgeInsetsZero];
       }
   
       if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
           [cell setLayoutMargins:UIEdgeInsetsZero];
       }
   }

9. UItableView 中或是其superview 中有 tap 事件时 tableView 不响应 tableVeiw:didSelectedRowAtIndex: 方法