Question

我创建了一个NSScrollView并在其中添加自定义NSVIew但是在运行时，它总是在底部有一个空格而滚动条总是在底部。现在，我想滚动视图适合自定义视图和滚动条始终在顶部。这是我的代码：

 float label_Y;
float textfield_Y;
float heightView;
-(void) createTableWiFi: (int) number
{

    heightView = (25 + 30) * number;

    guiView = [[NSView alloc] initWithFrame:NSMakeRect(0,0,600, heightView)];

    label_Y = heightView;
    textfield_Y = heightView ;
    [[ScrollView verticalScroller] setFloatValue:0.0];
    [[ScrollView contentView] scrollToPoint:NSMakePoint(0.0, heightView)];
    int i;
    for(i=1; i<=number;i++)
    {

        ssidtxt = [[NSTextField alloc] initWithFrame:NSMakeRect (50,textfield_Y,130,25)];
        [ssidtxt setBezelStyle:NSTextFieldSquareBezel];
        ssidtxt.tag=i;
        [ssidtxt setAutoresizingMask:NSViewWidthSizable];

        [guiView addSubview:ssidtxt];

        [ssidtxt release];


        keytxt = [[KSPasswordField alloc] initWithFrame:NSMakeRect (200,textfield_Y,130,25)];
        [guiView addSubview:keytxt];
        [keytxt release];

        textfield_Y -=30;
    }
    prototype= [[NSButtonCell alloc] init];
    [prototype setTitle:@""];
    [prototype setButtonType:NSRadioButton];

    NSRect matrixRect = NSMakeRect(500, textfield_Y +25  , 50,25 *(i-1));
    myMatrix = [[NSMatrix alloc] initWithFrame:matrixRect
                                          mode:NSRadioModeMatrix
                                     prototype:(NSCell *)prototype
                                  numberOfRows:i-1
                               numberOfColumns:1];
    [myMatrix setCellSize:NSMakeSize(50, 30)];

    [myMatrix setAction:@selector(radioButtonClicked:)];
    NSArray *cellArray = [myMatrix cells];

    [guiView addSubview:myMatrix];

    [ScrollView  setDocumentView :guiView];
    [[ScrollView verticalScroller] setFloatValue:0.0];
    [[ScrollView contentView] scrollToPoint:NSMakePoint(0.0, heightView)];
    [guiView release];
}

欢迎任何建议。提前致谢

Answer 1

不要这样做。

[[ScrollView verticalScroller] setFloatValue:0.0];

您可能会强迫它导致一些不一致。如果您的滚动条位置未更新（我不确定这是否是您的问题），请使用

[ScrollView reflectScrolledClipView:[ScrollView contentView]];

另请阅读Cocoa coding guidelines。它的阅读时间相对较短但非常值得。

NSScrollView底部有空格，Cocoa底部的滚动条总是在底部

1 个答案: