Objective-c之NSString(NSMutableString)
Objective-c之NSString(NSMutableString)
Objective-c之NSString(NSMutableString) (2010-12-09 20:48:24)
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1、初始化字符串一
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[[NSString alloc] initWithFormat: “%d”,10];
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2、初始化字符串二
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[[NSString alloc] initWithCString: “字符串内容”]
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3、字符串的替换
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注：将字符串中的参数进行替换
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参数1：目标替换值
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参数2：替换成为的值
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参数3：类型为默认：NSLiteralSearch
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参数4：替换的范围
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[str replaceOccurrencesOfString: “1” withString: “222”
options:NSLiteralSearch range:NSMakeRange(0, [str length])];
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4、给字符串分配容量
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NSMutableString *String;
String = [NSMutableString stringWithCapacity:40];
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5、追加字符串
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NSMutableString *String1 = [[NSMutableString alloc]
initWithString: “This is a NSMutableString”];
[String1 appendFormat:[NSString stringWithFormat: “, I will be adding
some character”]];
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6、在已有字符串中按照所给出范围和长度删除字符
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NSMutableString *String1 = [[NSMutableString alloc]
initWithString: “This is a NSMutableString”];
[String1 deleteCharactersInRange:NSMakeRange(0, 5)];
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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
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NSMutableString *String1 = [[NSMutableString alloc]
initWithString: “This is a NSMutableString”];
[String1 insertString: “Hi! “ atIndex:0];
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8、按照所给出的范围，和字符串替换的原有的字符
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NSMutableString *String1 = [[NSMutableString alloc]
initWithString: “This is a NSMutableString”];
[String1 replaceCharactersInRange:NSMakeRange(0, 4)
withString: “That”];
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9、判断字符串内是否还包含别的字符串(前缀，后缀)
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NSString *String1 = “NSStringInformation.txt”;
[String1 hasPrefix: “NSString”] = = 1 ? NSLog( “YES”) : NSLog( “NO”);
[String1 hasSuffix: “.txt”] = = 1 ? NSLog( “YES”) : NSLog( “NO”);
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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。
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- （NSArray*）componentsSeparatedByString：（NSString*）NString
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参数
分离器
分隔符的字符串。
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NSString *list = “Norman, Stanley, Fletcher”;
NSArray *listItems = [list componentsSeparatedByString: “, “];
listItems包含了：
{ “Norman”, “Stanley”, “Fletcher” }.
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11、是否包含该字符串
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NSRange range = [ “字符串–A” rangeOfString:“是否包含–B”];
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if (range.location == NSNotFound)
{//不包含
}
else
{//包含
}
