回答編集履歴
1
ちなみに
answer
CHANGED
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@@ -4,4 +4,16 @@
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4
4
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NSString *tmp = [_MessageView.text stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]];
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5
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//NSLog(@"[%@]", tmp);
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6
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_SendBtn.enabled = (tmp.length > 0);
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7
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-
```
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7
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```
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9
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# ちなみに
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10
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11
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改行1個だけなら`@"\n"`で判定してもいいですが、文字列比較の方法が間違っています。
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12
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+
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13
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```objectivec
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14
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//× warning出てませんか?
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15
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_MessageView.text == @"\n"
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16
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17
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//○
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18
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[_MessageView.text compare:@"\n"] == NSOrderedSame
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19
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```
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