NSString char *互相转换

//string 转成 char:

NSString to const char *:
NSString * cocoaString = [[NSString alloc] initWithString:@"My NSString"];
const char * myCstring = [cocoaString cString];

char mychar[100];
NSString * mystring;
strcpy(mychar,(char *)[mystring UTF8String]);

 

//char 转成 string:

NSString *TempString;
char mychar[100];
mystring=[NSString stringWithFormat:@"%s",mychar];

const char * to NSString:
const char * cString = "Hello";
NSString * cocoaString = [[NSString alloc] initWithCString:cString];

 

NSString *tempA = @"123";

NSString *tempB = @"456";

1，字符串拼接

NSString *newString = [NSString stringWithFormat:@"%@%@",tempA,tempB];

2，字符转int

int intString = [newString intValue];

3，int转字符

NSString *stringInt = [NSString stringWithFormat:@"%d",intString];

4，字符转float

float floatString = [newString floatValue];

5，float转字符

NSString *stringFloat = [NSString stringWithFormat:@"%f",intString];