使用情節提要板在UIViewController中初始化自定義UIView

Question

我有一個自定義UIViewcontroller，想初始化並分配一個自定義UIView，我之前將其分配給了IBOutlet。 我正在使用情節提要。 誰能給我提示在哪里調用自定義UIView的指定初始化程序？

**MyCustomUIView.h**

@interface MyCustomUIView : UIView

@end

**MyCustomUIView.m**
@implementation MyCustomUIView 
- (id)initWithNumberOfHeaderRows:(NSUInteger)headerRowCount numberOfHeaderColumns:(NSUInteger)headerColumnCount frame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {

    }
    return self;
}
@end


**MyUIViewController.h**
@interface MyUIViewController : UIViewController
@property (weak, nonatomic) IBOutlet MyCustomUIView *myCustomUIView; // I wanna use this Outlet
@end

**MyUIViewController.m**
@implementation MyUIViewController 

@end

這是使用的github來源的抽象版本： https : //github.com/mutualmobile/MMSpreadsheetView/blob/master/MMSpreadsheetView/MMSpreadsheetView.m

Answer 1

您可以在控制器的viewDidLoad中調用自定義視圖的構造函數（初始化程序）。 然后，將其添加為控制器視圖的子視圖。

像這樣：

- (void)viewDidLoad {
    ...
    MyCustomUIView *customView = [MyCustomUIView alloc] initWithNumberOfHeaderRows:0 numberOfHeaderColumns:0 frame:CGRectZero];
    [self.view addSubview:customView];
    ...    
}

更新

我認為您應該創建自定義視圖類，如下所示：

//MyCustomView.h
@interface MyCustomView : UIView

- (id)initWithNumberOfHeaderRows:(NSUInteger)numberOfHeaderRows numberOfHeaderColumns:(NSUInteger)numberOfHeaderColumns;

@property (readwrite, nonatomic) NSUInteger numberOfHeaderRows;
@property (readwrite, nonatomic) NSUInteger numberOfHeaderColumns;

@end

//MyCustomView.m
@implementation

- (void)setup {
    // Do custom stuffs here...
}

- (id)initWithNumberOfHeaderRows:(NSUInteger)numberOfHeaderRows numberOfHeaderColumns:(NSUInteger)numberOfHeaderColumns {
    self = [self initWithFrame:CGRectZero];
    if (self) {
        self.numberOfHeaderRows = numberOfHeaderRows;
        self.numberOfHeaderColumns = numberOfHeaderColumns;
    }
    return self;
}

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self setup];
    }
    return self;
}

- (id)init {
    self = [super init];
    if (self) {
        [self setup];
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self setup];
    }
    return self;
}

@end

然后在viewDidLoad中：

- (void)viewDidLoad {
    ...
    // Assuming you have an IBOutlet property of MyCustomView class with a name 'customView'
    // That property must be hooked up from the xib/storyboard
    self.customView.numberOfHeaderRows = 1;
    self.customView.numberOfHeaderColumns = 1;
    self.customView.frame = self.view.bounds;
    ...
}

更新2

您可以簡單地添加一個公共方法來設置自定義視圖中標題行和列的數量。

//MyCustomView.h
@interface MyCustomView : UIView

...
- (void)setNumberOfHeaderRows:(NSUInteger)rows numberOfHeaderColumns:(NSUInteger)columns; 
...

@end

//MyCustomView.m
@implementation MyCustomView

...
- (void)setNumberOfHeaderRows:(NSUInteger)rows numberOfHeaderColumns:(NSUInteger)columns {
    //Do the custom stuffs that you want...
}
...

@end

然后在viewDidLoad中

- (void)viewDidLoad {
    ...
    [self.customView setNumberOfHeaderRows:10 numberOfHeaderColumns:4];
    ...
}

更新3

根據給定的參考文件，可以在DataSource中添加方法：

    //MMSpreadsheetView.h
    @optional
    ...
    - (NSUInteger)spreadsheetViewNumberOfHeaderRows:(MMSpreadsheetView *)spreadsheetView;
    - (NSUInteger)spreadsheetViewNumberOfHeaderColumns:(MMSpreadsheetView *)spreadsheetView;
    ...

然后，在實現文件中：

//MMSpreadsheetView.m
...
- (void)setupWithNumberOfHeaderRows:(NSUInteger)rows numberOfHeaderColumns:(NSUInteger)columns {
    _scrollIndicatorInsets = UIEdgeInsetsZero;
    _showsVerticalScrollIndicator = YES;
    _showsHorizontalScrollIndicator = YES;
    _headerRowCount = headerRowCount;
    _headerColumnCount = headerColumnCount;

    if (headerColumnCount == 0 && headerRowCount == 0) {
        _spreadsheetHeaderConfiguration = MMSpreadsheetHeaderConfigurationNone;
    }
    else if (headerColumnCount > 0 && headerRowCount == 0) {
        _spreadsheetHeaderConfiguration = MMSpreadsheetHeaderConfigurationColumnOnly;
    }
    else if (headerColumnCount == 0 && headerRowCount > 0) {
        _spreadsheetHeaderConfiguration = MMSpreadsheetHeaderConfigurationRowOnly;
    }
    else if (headerColumnCount > 0 && headerRowCount > 0) {
        _spreadsheetHeaderConfiguration = MMSpreadsheetHeaderConfigurationBoth;
    }
    self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    self.backgroundColor = [UIColor grayColor];
    [self setupSubviews];
}

- (id)initWithNumberOfHeaderRows:(NSUInteger)headerRowCount numberOfHeaderColumns:(NSUInteger)headerColumnCount frame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self setupWithNumberOfHeaderRows:rows numberOfHeaderColumns:columns];
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    if (self) {
        NSUInteger rows = 0;
        NSUInteger columns = 0;
        if (self.dataSource && [self.dataSource respondsToSelector:@selector(spreadsheetViewNumberOfHeaderRows:)]) {
            rows = [self.dataSource spreadsheetViewNumberOfHeaderRows:self];
        }
        if (self.dataSource && [self.dataSource respondsToSelector:@selector(spreadsheetViewNumberOfHeaderColumns:)]) {
            columns = [self.dataSource spreadsheetViewNumberOfHeaderColumns:self];
        }
        [self setupWithNumberOfHeaderRows:rows numberOfHeaderColumns:columns];
    }
    return self;
}
...

Answer 2

另一個選擇是為您的視圖采用數據源模式。 例如，在MyCustomUIView.h中：

@class MyCustomUIView;

@protocol MyCustomUIViewDataSource
- (NSInteger)numberOfHeadersInMyCustomUIView:(MyCustomUIView *)view;
- (NSInteger)numberOfHeaderColumnsInMyCustomUIView:(MyCustomUIView *)view;
@end

@interface MyCustomUIView : UIView

@property (nonatomic, strong) id<MyCustomUIViewDataSource> dataSource;

@end

在MyCustomUIView.m中添加：

- (void)setDataSource:(id<MyCustomUIViewDataSource>)dataSource {
    self.dataSource = dataSource;
    self.headerRowCount = [self.dataSource numberOfHeadersInMyCustomUIView:self];
    self.headerColumnsCount = [self.dataSource numberOfHeaderColumnsInMyCustomUIView:self];

    // Rearrange view with the new values
}

然后在您的UIViewController中：

- (void)viewDidLoad {
    [super viewDidLoad];
    self.myCustomUIView.dataSource = self;
}

- (NSInteger)numberOfHeadersInMyCustomUIView:(MyCustomUIView *)view {
    return 5;
}

- (NSInteger)numberOfHeaderColumnsInMyCustomUIView:(MyCustomUIView *)view {
    return 2;
}

您甚至可以在自定義視圖中添加重新加載方法。