NSDictionary *attrs = @{NSFontAttributeName : [UIFont boldSystemFontOfSize:17]};
CGSize size=[_itemNamelabel.text sizeWithAttributes:attrs];
[self.itemNamelabel setFrame:CGRectMake(40, 10, size.width, 20)];
NSDictionary *attrs = @{NSFontAttributeName : [UIFont boldSystemFontOfSize:17]};
CGSize size=[_itemNamelabel.text sizeWithAttributes:attrs];
[self.itemNamelabel setFrame:CGRectMake(40, 10, size.width, 20)];
本文标题：iOS 根据文字的多少计算label宽度
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