Objective-c之NSString(NSMutableString)
Objective-c之NSString(NSMutableString)
Ios基础语法 Ios-NSString
Objective-c之NSString(NSMutableString) (2010-12-09 20:48:24)

1、初始化字符串一
[[NSString alloc] initWithFormat:@”%d”,10];
2、初始化字符串二
[[NSString alloc] initWithCString:@”字符串内容”]
3、字符串的替换
注:将字符串中的参数进行替换
参数1:目标替换值
参数2:替换成为的值
参数3:类型为默认:NSLiteralSearch
参数4:替换的范围
[str replaceOccurrencesOfString:@”1” withString:@”222” options:NSLiteralSearch range:NSMakeRange(0, [str length])];
4、给字符串分配容量
NSMutableString *String;
String = [NSMutableString stringWithCapacity:40];
5、追加字符串
NSMutableString *String1 = [[NSMutableString alloc] initWithString:@”This is a NSMutableString”];
[String1 appendFormat:[NSString stringWithFormat:@”, I will be adding some character”]];
6、在已有字符串中按照所给出范围和长度删除字符
NSMutableString *String1 = [[NSMutableString alloc] initWithString:@”This is a NSMutableString”];
[String1 deleteCharactersInRange:NSMakeRange(0, 5)];
7、在已有字符串后面在所指定的位置中插入给出的字符串
NSMutableString *String1 = [[NSMutableString alloc] initWithString:@”This is a NSMutableString”];
[String1 insertString:@”Hi! “ atIndex:0];
8、按照所给出的范围,和字符串替换的原有的字符
NSMutableString *String1 = [[NSMutableString alloc] initWithString:@”This is a NSMutableString”];
[String1 replaceCharactersInRange:NSMakeRange(0, 4) withString:@”That”];
9、判断字符串内是否还包含别的字符串(前缀,后缀)
NSString *String1 = @”NSStringInformation.txt”;
[String1 hasPrefix:@”NSString”] = = 1 ? NSLog(@”YES”) : NSLog(@”NO”);
[String1 hasSuffix:@”.txt”] = = 1 ? NSLog(@”YES”) : NSLog(@”NO”);
10、返回一个数组,包含从已经由一个给定的分隔符分为接收器****串。
- (NSArray)componentsSeparatedByString:(NSString)NString
参数
分离器
分隔符的字符串。
NSString *list = @”Norman, Stanley, Fletcher”;
NSArray *listItems = [list componentsSeparatedByString:@”, “];
listItems包含了:
{ @”Norman”, @”Stanley”, @”Fletcher” }.
11、是否包含该字符串
NSRange range = [@”字符串–A” rangeOfString:“是否包含–B”];
if (range.location == NSNotFound)
{//不包含
}
else
{//包含
}

