iOS之自动调节输入文本框的高度

 1 //自动调节输入文本框的高度
 2 
 3 - (void)textViewDidChange:(UITableView *)textView{
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 5     float height;
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 7     if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
 8 
 9         CGRect textFrame = [[self.textView layoutManager] usedRectForTextContainer:[self.textView textContainer]];
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11         height = textFrame.size.height;
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13     }
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15     else{
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17         height = self.textView.contentSize.height;
18 
19     }
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21     self.textView.frame = CGRectMake(self.textView.frame.origin.x, self.textView.frame.origin.y, self.textView.frame.size.width, height);
22 
23 }
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25