OC各种数据类型之间的转换方法

Posted 2020-09-25 星星太阳鱼虾蟹

NSNumber转NSString:

假设现有一NSNumber的变量A，要转换成NSString类型的B

方法如下：

NSNumberFormatter* numberFormatter = [[NSNumberFormatteralloc] init];

B = [numberFormatter stringFromNumber:A];

[numberFormatter release];

 

nsstring和float 还有int之间的转换

 

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];

///////

[plain] view plaincopyprint?

1. NSString *a = [[NSString alloc] initWithString : @"5, 10, 2, 0, 0, 0.01, 1, 0.05, 0, 0, 0"];
2. NSArray *bullteData = [a componentsSeparatedByString:@","]; 
3. [a release]; 
4. for (int i = 0; i < [bullteData count]; i++) { 
5. NSLog(@"%f",[[NSString stringWithFormat:@"%@",[bullteData objectAtIndex:i]] floatValue]);
6. } 

[plain] view plain copy

 print?

1. NSString *a = [[NSString alloc] initWithString : @"5, 10, 2, 0, 0, 0.01, 1, 0.05, 0, 0, 0"];  
2. NSArray *bullteData = [a componentsSeparatedByString:@","];  
3. [a release];  
4. for (int i = 0; i < [bullteData count]; i++) {  
5. NSLog(@"%f",[[NSString stringWithFormat:@"%@",[bullteData objectAtIndex:i]] floatValue]);  
6. }