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1
2
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NSString *tempA = @"123";
NSString *tempB = @"456";
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1，字符串拼接
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1
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NSString *newString = [NSString stringWithFormat:@"%@%@",tempA,tempB];
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2，字符转int
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1
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int intString = [newString intValue];
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3，int转字符
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1
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NSString *stringInt = [NSString stringWithFormat:@"%d",intString];
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4，字符转float
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1
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float floatString = [newString floatValue];
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5，float转字符
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1
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NSString *stringFloat = [NSString stringWithFormat:@"%f",intString];
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6.截取字符串
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1
2
3
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5
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NSString*string =@"sdfsfsfsAdfsdf";
string = [string substringToIndex:7];//截取下标7之后的字符串
NSLog(@"截取的值为：%@",string);
[string substringFromIndex:2];//截取下标2之前的字符串
NSLog(@"截取的值为：%@",string);
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7.匹配字符串
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2
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5
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NSString*string =@"sdfsfsfsAdfsdf";
NSRangerange = [stringrangeOfString:@"f"];//匹配得到的下标
NSLog(@"rang:%@",NSStringFromRange(range));
string = [string substringWithRange:range];//截取范围类的字符串
NSLog(@"截取的值为：%@",string);
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8.分隔字符串
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1
2
3
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NSString*string =@"sdfsfsfsAdfsdf";
NSArray *array = [string componentsSeparatedByString:@"A"]; //从字符A中分隔成2个元素的数组
NSLog(@"array:%@",array); //结果是adfsfsfs和dfsdf
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