Objective-c之NSString(NSMutableString)

、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 componentsSeparatedByStr ing:@", "]; 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 } 转自:http://blog.sina.com.cn/s/blog_4adf31ea0100nlmn.html