Macos 带左对齐占位符的NSSearchField

设置

centersPlaceholder=false

后，占位符将在左侧正确对齐，但搜索按钮不会显示其图像。输入某些文本时，“取消”按钮也是如此。这是正确的行为还是我遗漏了什么？

揭示了如何使用奇怪的行为（ab）在字段中强制左对齐。只需将NSSearchFieldCell子类化并覆盖

draw

方法：

import Cocoa

class FilterFieldCell: NSSearchFieldCell {
    override func draw(withFrame cellFrame: NSRect, in controlView: NSView) {
        super.draw(withFrame: cellFrame, in: controlView)
    }
}

然后将搜索字段单元格设置为此类。

#定义kSearchButtonWidth 22.f
#define kSearchButtonWidth 22.f

#import "AMSearchField.h"

@implementation AMSearchField

- (void)drawRect:(NSRect)dirtyRect {
    [super drawRect:dirtyRect];
    // Drawing code here.
}

- (NSRect)rectForSearchButtonWhenCentered:(BOOL)isCentered
{
    CGRect rect = [super rectForSearchButtonWhenCentered:isCentered];
    if (rect.size.width < kSearchButtonWidth) {
        rect.size.width = kSearchButtonWidth;
    }
    return rect;
}

- (NSRect)rectForSearchTextWhenCentered:(BOOL)isCentered
{
    CGRect rect = [super rectForSearchTextWhenCentered:isCentered];
    if (rect.origin.x < kSearchButtonWidth) {
        CGFloat delta = kSearchButtonWidth - rect.origin.x;
        rect.origin.x = kSearchButtonWidth;
        rect.size.width = rect.size.width - delta;
    }
    return rect;
}

@end

#导入“AMSearchField.h”
@搜索字段的实现
-（void）drawRect:（NSRect）dirtyRect{
[super-drawRect:dirtyRect]；
//这里是绘图代码。
}
-（NSRect）矩形搜索按钮居中时：（BOOL）输入
{
CGRect rect=[super-rectForSearchButtonWhenCentered:isCentered]；
if（rect.size.width

---

在xib文件中，将search class设置为

AMSearchField

，我认为您也可以通过在

NSSearchField

的子类上重写

draw（udirtyrect:NSRect）

并调用super来修复该绘图。