NSString 常用
Objective-c之NSString(NSMutableString)
2011-06-08 15:13
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"; { @"Norman", @"Stanley", @"Fletcher" }. |
11、是否包含该字符串
NSRange range = [@"字符串--A" rangeOfString:“是否包含--B”];
{//不包含 } else {//包含 } |