OC 惯用数据类型之间的转换

OC 常用数据类型之间的转换

1： NSString ?<==> NSInteger

NSInteger转化?NSString类型：??????[NSString?stringWithFormat:?@"%d", NSInteger];NSString转化?NSInteger类型：? ? ? NSInteger = [?NSString??intValue]
2 : NSString <==> NSNumberNSNumber 转换 NSString 类型：

NSMutableArray?*array?=?[[NSMutableArray?alloc]init];??

????[array?addObject:[NSNumber?numberWithInt:88]]; ?4.NSString 与 int ,float,double,NSInteger之间的转换

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：

B?= [numberFormatter?[numberFormatter??

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 = [newStringfloatValue];

5，float转字符

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

///////[plain] view plaincopyprint?

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

[plain] view plaincopyprint?

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

将字符串存到数组中，在读取的时候转换成需要的类型。

OC 惯用数据类型之间的转换

热点推荐