NSString字体大小特定于框架宽度 [英] NSString font size specific to frame width

问题描述

我正在使用 drawRect 进行文本显示，并调用 NSString 。我正在尝试使用 sizeWithFont 实现默认字体大小为17的自动调整字体大小（缩小），并使用循环将不适合的字体大小减小1。宽度大小。谁能帮我实现这个目标？现在的示例很好，我将字体大小设置为17.0

I am using drawRect for a text display, calling NSString. I am trying to implement using sizeWithFont to auto resizing font (shrinking) with default font size of 17 and using a loop to reduce the font size by 1 if it does not fit the size of width. Can anyone help me how to implement this? Example would be nice right now I just have the font size set to 17.0

[[self.string displayName] drawAtPoint:CGPointMake(xcoord, ycoord) withFont:[UIFont boldSystemFontOfSize:17.0]];
CGSize size = [[self.patient displayName] sizeWithFont:[UIFont boldSystemFontOfSize:17.0]];
max_current_y = size.height > max_current_y ? size.height : max_current_y;
xcoord = xcoord + 3.0f + size.width;

推荐答案

好吧。这是使用NSString为其返回字体的方法的修改版本：

OK never mind. Here's modified version of the same method that takes NSString for which to return a font:

    -(UIFont*)getFontForString:(NSString*)string
               toFitInRect:(CGRect)rect
                  seedFont:(UIFont*)seedFont{
    UIFont* returnFont = seedFont;
    CGSize stringSize = [string sizeWithAttributes:@{NSFontAttributeName : seedFont}];

    while(stringSize.width > rect.size.width){
        returnFont = [UIFont systemFontOfSize:returnFont.pointSize -1];
        stringSize = [string sizeWithAttributes:@{NSFontAttributeName : returnFont}];
    }

    return returnFont;
}

在这里是这样称呼的：

NSString* stringToDraw = @"Test 123";

    CGRect rect = CGRectMake(100., 100., 100., 200.);
    UIFont* font = [self getFontForString:stringToDraw toFitInRect:rect seedFont:[UIFont systemFontOfSize:20]];
    [stringToDraw drawInRect:rect withFont:font];

代码适用于iOS7 +

Code is for iOS7+

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