去除首尾空格：
NSString * content = [textView.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
去除首尾空格和换行：
NSString *content = [textView.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
去除首尾空格：
NSString * content = [textView.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
去除首尾空格和换行：
NSString *content = [textView.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
本文标题：ios 去除字符串首尾空格、换行
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