NStimeInterval property error

开发者_JS百科My object declared as follows:

my.h

@interface My:NSObject{
    NSTimeInterval time;
}
@property (assign) NSTimeInterval time;
@end

my.m

@implementation My
@synthesize time;
@end

somewhere in the code:

-(NSTimeInterval)getTimeInterval:(NSString*)timeStr
{
    NSTimeInterval interval;
    //some code
    return interval;
}


-(void) func:(NSString*)timeInterval
{
    My *my = [[My alloc] init];
    my.time = [self getTimeInterval:timeInterval];
}

in the line

my.time = [self getTimeInterval:timeInterval];

i get error: "incompatible type for argument 1 of 'setTime' "

Can anyone tell me where is the problem?

You function "getTimeInterval" takes a string as an argument, and I presume that you're passing in a NSTimeInterval / double into the function, causing the warning. You should change your

-(NSTimeInterval)getTimeInterval:(NSString*)timeStr 

To take a parameter of NSTimerInterval (which is just a fancy way to say double). If you mean to pass in a string representation of a time and get a NSTimeInterval back, you have a bug in your code, and should change timeInterval variable to a string variable containing your time instead.

This seems strange in so many ways.

I'm pretty sure NSTimeInterval is a just a typedef for double, which makes the definition of the property as assign to be wrong. Remove it and see if it works.