iOS NSString获取指定下标字符,NSString获取指定下标字符,NSString substringWithRange,NSString characterAtIndex,

iOS NSString判断字符串是否为空判,NSString字符串是否为空判,NSString空字符串,NSString isEqual,

iOS NSString获取字符串长度,NSString获取字符串长度,NSString lengthOfBytesUsingEncoding, NSString length,NSString计算中文长度,

iOS NSString 和 bool 相互转换 NSString *str1 = @'YES'; NSString *str2 = @'NO'; //ok NSLog(@'str1 = %d str2 = %d',[str1 boolValue],[str2 boolValue]); BOOL a = YES; BOOL b = NO; NSSt...

iOS NSString 与 float 相互转换 一.NSString 转 float NSString *stringFloat = @“120.5”; float fvalue = [stringFloat floatValue]; 二.float 转 NSString float fvalue = 100.5; NSString...

iOS NSString 与 char 相互转换 一.NSString 转 char 1.stringWithFormat 2.stringWithUTF8String 3.stringWithCString 二.char 转 NSString 1.UTF8String 2.cStringUsingEncoding

iOS NSString 与 int 相互转换 - 一.NSString 转 int int ivalue = 100; NSString *string = [NSString stringWithFormat:@'%d',ivalue]; 二.int 转 NSString NSString *stringInt = @“120”; ...

iOS NSURL 与 NSString相互转换 - NSString *str = @'www.codersrc.com'; //将string转化URL NSURL *url= [NSURL URLWithString:str]; //将URL转化string NSString *string = [url absoluteStri...

iOS NSString 创建和初始化 + (instancetype)string; + (instancetype)stringWithString:(NSString *)string; + (instancetype)stringWithCharacters:(const unichar *)characters length:(NSUI...

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