int a=0;
int b=0;
a+=2;
b=+2;
NSLog(@"detailLabSize---%f--%d--%d",detailLabSize.height,a,b);
detailLabSize---31.027344--2--2 結(jié)果一樣
int a=0;
int b=0;
a+=2;
b=+2;
NSLog(@"detailLabSize---%f--%d--%d",detailLabSize.height,a,b);
detailLabSize---31.027344--2--2 結(jié)果一樣