如果我有像"How are you doing ?"或的字符串"I am fine ."
"How are you doing ?"
"I am fine ."
我怎样才能得到 -
"How are you doing?" 要么 "I am fine."
"How are you doing?"
"I am fine."
我想删除最后一个单词和"？"之间的空格.要么 "."
objective-c nsstring ios
ios ×1
nsstring ×1
objective-c ×1