爆出错误:
Incompatible pointer types assigning to 'UITextfield *_strong' from 'NSNumber *_strong
代码:
.h文件
@property (weak, nonatomic) IBOutlet UITextField *initialBudget;
@property (weak, nonatomic) IBOutlet UITextField *expenses;
@property (weak, nonatomic) IBOutlet UITextField *timeSpent;
@property (weak, nonatomic) IBOutlet UITextField *incomePerHour
计算:
- (IBAction)calculateResults:(id)sender {
double budget = [initialBudget.text doubleValue ];
double expense = [expenses.text doubleValue];
double time = [timeSpent.text doubleValue];
double hourlyIncome = (budget - expense)/time;
NSNumber *resultNumber = [[NSNumber alloc] initWithDouble:hourlyIncome];
incomePerHour = resultNumber;
};