• 修改UITextField文本输入框中的clearButton小图片 // 获取X按钮 UIButton *passwordBtn = [_passwordField valueForKey:@”_clearButton”]; // 修改按钮图片 [passwordBtn setImage:[UIImage imageNamed:@”login_checkbox_checked”] forState:UIControlStateNormal]; UIButton *accountBtn = [_accountField valueForKey:@”_clearButton”]; [accountBtn setImage:[UIImage imageNamed:@”login_checkbox_checked”] forState:UIControlStateNormal];

  • tableview不想显示没有内容的cell

self.tableview.tablefooterview = [UIView new];

  • 自定义了leftBarbuttonItem左滑返回手势失效了怎么办? self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:img style:UIBarButtonItemStylePlain target:self action:@selector(onBack:)]; self.navigationController.interactivePopGestureRecognizer.delegate = (id)self;
  • ScrollView在viewController终不能滑到顶

self.automaticallyAdjustsScrollViewInsets = NO;

  • 写键盘事件让你不爽了

github搜索 IQKeyboardManger

  • 怎么在不新建一个cell的情况下调整separaLine的位置?

self.tableview.separatorinset = UIEdgeInsetMake(0,100,0,0)

  • 点击self.view 就收起键盘
    • (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [self.view endEditing:YES]; }
  • 滑动的时候隐藏navigationbar?

navigationController.hidesBarsonSwipe = YES

  • ViewController 实现tableview那种悬停header

CSStickyHeaderFlowLayout

  • CoreData用来不爽?

MagicalRecord

  • 修改UITextField placeholder的文字颜色&位置

    • (void) drawPlaceholderInRect:(CGRect)rect {

    [[UIColor blueColor] setFill]; [self.placeholder drawInRect:rect withFont:self.font lineBreakMode:UILineBreakModeTailTruncation alignment:self.textAlignment]; }

  • navigationbar弄成透明的而不是带模糊的效果? [self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault]; self.navigationBar.shadowImage = [UIImage new]; self.navigationBar.translucent = YES;

  • 修改tableview里面cell的小对勾颜色

tableview.tintcolor = [uicolor redcolor]

  • 使用一个pan手势来代替UISwipegesture各个方向

    • (void)pan:(UIPanGestureRecognizer *)sender {

    typedef NS_ENUM(NSUInteger, UIPanGestureRecognizerDirection) { UIPanGestureRecognizerDirectionUndefined, UIPanGestureRecognizerDirectionUp, UIPanGestureRecognizerDirectionDown, UIPanGestureRecognizerDirectionLeft, UIPanGestureRecognizerDirectionRight }; static UIPanGestureRecognizerDirection direction = UIPanGestureRecognizerDirectionUndefined; switch (sender.state) {

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    case UIGestureRecognizerStateBegan: {
        if (direction == UIPanGestureRecognizerDirectionUndefined) {
            CGPoint velocity = [sender velocityInView:recognizer.view];
            BOOL isVerticalGesture = fabs(velocity.y) > fabs(velocity.x);
            if (isVerticalGesture) {
                if (velocity.y > 0) {
                    direction = UIPanGestureRecognizerDirectionDown;
                } else {
                    direction = UIPanGestureRecognizerDirectionUp;
                }
            }
            else {
                if (velocity.x > 0) {
                    direction = UIPanGestureRecognizerDirectionRight;
                } else {
                    direction = UIPanGestureRecognizerDirectionLeft;
                }
            }
        }
        break;
    }
    case UIGestureRecognizerStateChanged: {
        switch (direction) {
            case UIPanGestureRecognizerDirectionUp: {
                [self handleUpwardsGesture:sender];
                break;
            }
            case UIPanGestureRecognizerDirectionDown: {
                [self handleDownwardsGesture:sender];
                break;
            }
            case UIPanGestureRecognizerDirectionLeft: {
                [self handleLeftGesture:sender];
                break;
            }
            case UIPanGestureRecognizerDirectionRight: {
                [self handleRightGesture:sender];
                break;
            }
            default: {
                break;
            }
        }
        break;
    }
    case UIGestureRecognizerStateEnded: {
        direction = UIPanGestureRecognizerDirectionUndefined;
        break;
    }
    default:
        break;

    } }

  • 图片拉伸

在Storyboard或xib中拖入的控件都有Stretching属性，包含四个参数：X、Y、Width、Height。这些参数确定了进行拉伸的区域。 当X = Y = Width = Height = 1时，图片为原始大小。 若让X = Y = 0.5、Width = Height = 0，则按水平垂直位置的那个像素点进行拉伸，如图所示。

  • 修改UISearchBar 的占位符文字颜色 /设置UISearchBar/ // 创建 UISearchBar *searchBar = [[UISearchBar alloc] init]; // 设置导航条背景色 self.navigationController.navigationBar.barTintColor = [UIColor hollyGreenColor]; // 风格 searchBar.searchBarStyle = UISearchBarStyleMinimal; // 光标色 searchBar.tintColor = [UIColor whiteColor]; // 占位文字 searchBar.placeholder = @”搜索”; // 设置占位文字色彩 UITextField *searchField = [searchBar valueForKey:@”searchField”];

    [searchField setValue:[UIColor whiteColor] forKeyPath:@”_placeholderLabel.textColor”];