如何将CGRect对象存储在NSMutableArray中,然后在以后检索它们?
如何将CGRect对象存储在NSMutableArray中,然后在以后检索它们?
Answers:
您需要将CG结构包装在NSValue
类中。所以:
NSMutableArray* array = [NSMutableArray mutableArray];
[array addObject:[NSValue valueWithCGRect:CGRectMake(0,0,10,10)]];
CGRect someRect = [[array objectAtIndex:0] CGRectValue];
我们存储CGRect
,CGPoint
,CMTime
在一个对象NSMutableArray
,
[arrayName addObject:[NSValue valueWithCGPoint:MyCGPoint]]
[arrayName addObject:[NSValue valueWithCGRect:MyCGRect]]
[arrayName addObject:[NSValue valueWithCMTime:MyCMTime]]
[arrayName addObject:[NSValue valueWithCMTimeRange:MyCMTimeRange]]
Store string in array.and then get back string and convert that in CGRect back as per the need.
CGRect rect = CGRectMake( 5, 5, 40, 30 );
NSString* rectAsString = NSStringFromCGRect( rect );
NSMutableArray* array = [NSMutableArray mutableArray];
[array addObject:rectAsString];
For converting string in CGRect back use:-
CGRect rect9 = CGRectFromString(rectAsString);