ios label尺寸_UILabel固定尺寸, 自适应字体大小

- (UIFont*)adjustsFontSize:(UILabel*)label{

float curFontSize = label.font.pointSize;

UIFont *font = label.font;

CGRect rect;

rect = [label bounds];

if (rect.size.width == 0.0f || rect.size.height == 0.0f) {

return 0;

}

while (curFontSize > label.minimumScaleFactor && curFontSize > 0.0f) {

CGSize size = CGSizeZero;

// A single line of text should be clipped

if (label.numberOfLines == 1) {

size = [label.text sizeWithFont:font constrainedToSize:CGSizeMake(rect.size.width, 0.0f) lineBreakMode:NSLineBreakByClipping];

// size = [label.text boundingRectWithSize:CGSizeMake(rect.size.width, 0.0f)

// options:NSStringDrawingUsesFontLeading

// attributes:@{NSFontAttributeName: _font}

// context:NULL].size;

} else {

//Multiple lines of text should be wrapped

size = [label.text sizeWithFont:font constrainedToSize:CGSizeMake(rect.size.width, 0.0f) lineBreakMode:NSLineBreakByWordWrapping];

}

if (size.width < rect.size.width && size.height <= rect.size.height) {

break;

}

curFontSize -= 1.0f;

font = [font fontWithSize:curFontSize];

}

if (curFontSize < label.minimumScaleFactor) {

curFontSize = label.minimumScaleFactor;

}

if (curFontSize < 0.0f) {

curFontSize = 1.0f;

}

font = [font fontWithSize:curFontSize];

return font;

}