【Cocoa】cocoa UI 常用算法

来源：互联网发布：淘宝疯马皮哪家好编辑：程序博客网时间：2024/05/22 09:41

1. 计算字符串高度

- (void)resizeTextField:(NSTextField *)textField withAttributeString:(NSAttributedString *)attrStr andFixedWidth:(float)fixedWidth{    [textField setAttributedStringValue:attrStr];        NSTextFieldCell *cell = [textField cell];    [textField setStringValue:[attrStr string]];    float textFieldHeight = [cell cellSizeForBounds:NSMakeRect(0, 0, fixedWidth, FLT_MAX)].height;    [textField setStringValue:@""];        textField.frame = NSMakeRect(textField.frame.origin.x, textField.frame.origin.y, fixedWidth, textFieldHeight);}

-(void)setWarningText:(NSString*)text{    [textField setStringValue:text];    NSSize textSize = NSZeroSize;    if (textField.stringValue.length > 0) {        NSRange range;        NSDictionary* atribute = [[textField attributedStringValue] attributesAtIndex:0 effectiveRange:&range];                textSize = [textField.stringValue  boundingRectWithSize:NSMakeSize(textField.frame.size.width, 600) options:NSStringDrawingUsesLineFragmentOrigin attributes:atribute].size;    }        NSRect frame = self.frame;    int textHeight = (((textSize.height == 0) ? TOOL_SIZE : textSize.height)+ DELOREAN_GAP * 2);    frame.origin.y += frame.size.height - textHeight;    frame.size.height = textHeight;    self.frame = frame;}

［注］boundingRectWithSize:NSMakeSize(textField.frame.size.width, 600) 中600是随意的数字，最高不超过这个值

NSSize getTextLayoutByWidthAndFont(NSString* string, float width, NSFont* font){    NSSize containerSize;    containerSize.width = width;    containerSize.height = FLT_MAX;        //NSRangetextRange;    NSTextStorage* textStorage = [[NSTextStorage alloc] init];    NSTextContainer* textContainer = [[NSTextContainer alloc] initWithContainerSize:containerSize];    NSLayoutManager* textLayoutManager = [[NSLayoutManager alloc] init];        [textLayoutManager addTextContainer:textContainer];    [textStorage addLayoutManager:textLayoutManager];    [textContainer setLineFragmentPadding:0.0f];    NSDictionary *styles = [[[NSDictionary alloc] initWithObjectsAndKeys:                                       font, NSFontAttributeName,                                       [NSColor blackColor], NSForegroundColorAttributeName,                                       nil] autorelease];            [[textStorage mutableString] setString:string];    [textStorage setAttributes:styles range:NSMakeRange(0U, [string length])];    [textLayoutManager glyphRangeForTextContainer:textContainer];        containerSize.height = [textLayoutManager usedRectForTextContainer:textContainer].size.height;    [textContainer release];    [textStorage release];    [textLayoutManager release];        NSAttributedString* title = [[[NSAttributedString alloc] initWithString:string  attributes:styles] autorelease];    containerSize.width = containerSize.width < title.size.width?containerSize.width:title.size.width+2;    return containerSize;}

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