Cocoa 如何实现Apple'；给Mac的消息是什么？_Cocoa_Nstextfield_Nstextfieldcell

Cocoa 如何实现Apple'；给Mac的消息是什么？

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Cocoa 如何实现Apple'；给Mac的消息是什么？,cocoa,nstextfield,nstextfieldcell,Cocoa,Nstextfield,Nstextfieldcell,我想复制Messages/iMessage的嵌入式文本样式，或者浅灰色背景上的文本“白色阴影”样式如你所见，即使在浅灰色的背景上，文本也有“白色阴影”。粗体文本有亚像素渲染，而灰色文本没有（设计？）我尝试了-setBackgroundStyle:NSBackgroundStyleRaised。然而，它产生了比背景更暗的阴影-setBackgroundStyle:NSBackgroundStyleLowered更糟糕的是，它甚至超过了我的字体颜色设置那么，正确的方法是什么呢？任何技巧或只需

我想复制Messages/iMessage的嵌入式文本样式，或者浅灰色背景上的文本“白色阴影”样式

如你所见，即使在浅灰色的背景上，文本也有“白色阴影”。粗体文本有亚像素渲染，而灰色文本没有（设计？）

我尝试了

-setBackgroundStyle:NSBackgroundStyleRaised

。然而，它产生了比背景更暗的阴影<代码>-setBackgroundStyle:NSBackgroundStyleLowered更糟糕的是，它甚至超过了我的字体颜色设置

那么，正确的方法是什么呢？任何技巧或只需子类化

NSTextFields

？

解决方案1:

- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
{
    NSShadow *shadow = [[NSShadow alloc] init];
    [shadow setShadowOffset:NSMakeSize(0,-1)];
    [shadow setShadowColor:[NSColor whiteColor]];
    [shadow setShadowBlurRadius:0];

    NSMutableParagraphStyle *paragStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    [paragStyle setAlignment:[self alignment]];

    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
                      [self font],NSFontAttributeName,
                      shadow,NSShadowAttributeName,
                      [self textColor],NSForegroundColorAttributeName,
                      paragStyle,NSParagraphStyleAttributeName,nil];
    [shadow release];
    [paragStyle release];

    NSAttributedString *string = [[NSAttributedString alloc] initWithString:[self stringValue] attributes:attributes];
    [self setAttributedStringValue:string];
    [string release];
    [[self attributedStringValue] drawInRect:cellFrame];
}

我所能想到的最简单的解决方案是在彼此之间写两个文本（例如顶部为灰色，底部为白色，差值为1px）

解决方案2:

- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
{
    NSShadow *shadow = [[NSShadow alloc] init];
    [shadow setShadowOffset:NSMakeSize(0,-1)];
    [shadow setShadowColor:[NSColor whiteColor]];
    [shadow setShadowBlurRadius:0];

    NSMutableParagraphStyle *paragStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    [paragStyle setAlignment:[self alignment]];

    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
                      [self font],NSFontAttributeName,
                      shadow,NSShadowAttributeName,
                      [self textColor],NSForegroundColorAttributeName,
                      paragStyle,NSParagraphStyleAttributeName,nil];
    [shadow release];
    [paragStyle release];

    NSAttributedString *string = [[NSAttributedString alloc] initWithString:[self stringValue] attributes:attributes];
    [self setAttributedStringValue:string];
    [string release];
    [[self attributedStringValue] drawInRect:cellFrame];
}

当然，可以通过子类化

NSTextFieldCell

并添加shadow来完成

就像这样：

- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
{
    NSShadow *shadow = [[NSShadow alloc] init];
    [shadow setShadowOffset:NSMakeSize(0,-1)];
    [shadow setShadowColor:[NSColor whiteColor]];
    [shadow setShadowBlurRadius:0];

    NSMutableParagraphStyle *paragStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    [paragStyle setAlignment:[self alignment]];

    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
                      [self font],NSFontAttributeName,
                      shadow,NSShadowAttributeName,
                      [self textColor],NSForegroundColorAttributeName,
                      paragStyle,NSParagraphStyleAttributeName,nil];
    [shadow release];
    [paragStyle release];

    NSAttributedString *string = [[NSAttributedString alloc] initWithString:[self stringValue] attributes:attributes];
    [self setAttributedStringValue:string];
    [string release];
    [[self attributedStringValue] drawInRect:cellFrame];
}

结果：

- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
{
    NSShadow *shadow = [[NSShadow alloc] init];
    [shadow setShadowOffset:NSMakeSize(0,-1)];
    [shadow setShadowColor:[NSColor whiteColor]];
    [shadow setShadowBlurRadius:0];

    NSMutableParagraphStyle *paragStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    [paragStyle setAlignment:[self alignment]];

    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
                      [self font],NSFontAttributeName,
                      shadow,NSShadowAttributeName,
                      [self textColor],NSForegroundColorAttributeName,
                      paragStyle,NSParagraphStyleAttributeName,nil];
    [shadow release];
    [paragStyle release];

    NSAttributedString *string = [[NSAttributedString alloc] initWithString:[self stringValue] attributes:attributes];
    [self setAttributedStringValue:string];
    [string release];
    [[self attributedStringValue] drawInRect:cellFrame];
}