方法如下,调用即可:
- (CGSize)sizeWithFont:(UIFont *)font width:(CGFloat)width content:(NSString *)content {
NSDictionary *attrs = @{NSFontAttributeName : font};
CGSize size = CGSizeMake(width, CGFLOAT_MAX);
return [content boundingRectWithSize:size
options:NSStringDrawingUsesLineFragmentOrigin attributes:attrs context:nil].size;
}
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