OC各种数据类型之间的转换方法

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];

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[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. }